HE'S A SCIENCE TEACHER AND PART 
OF THE NATIONAL WEEK OF MAKING 
STARTING JUNE 16th.
PLEASE WELCOME 
"SCIENCE BOB" PFLUGFELDER.
>> THANKS FOR SCIENCE!
>> Jimmy: DID YOU MEET JOHNNY 
DEPP?
>> I DID, VERY NICE GUY, VERY 
FRIENDLY. 
>> Jimmy: WHAT ARE WE GOING TO 
DO HERE?
I LIKE SHOWING HOW SCIENCE IS 
USED IN EVERYDAY THINGS.
ANYONE THAT HAS A SMALL CHILD 
THAT USES DIAPERS?
>> Jimmy: I HAVE A SMALL CHILD 
THAT USES DIAPERS AND 
OCCASIONALLY I WEAR ONE MYSELF. 
>> THEY NEED TO DO A SHOTOUT TO 
POLYMER SCIENTISTS.
POLYMERS ARE LONG CHAINS OF 
MOLECULES.
HERE'S A DIAPER.
THERE ARE SURPRISES INSIDE OF 
DIAPERS. 
>> Jimmy: YES, THERE'S ALWAYS A 
SURPRISE.
[ LAUGHTER ]
>> TEAR THIS OPEN AND THEN SHAKE
IT OVER THE TABLE. 
>> Jimmy: OKAY. 
>> YOU SEE THIS POWDER?
>> Jimmy: YEAH.
COCAINE?
>> NO, THAT'S A POLYMER.
>> Jimmy: OH. 
>> IT HAS A VERY SPECIAL JOB.
WE HAVE A VERY LARGE AMOUNT OF 
WATER.
THEN THIS IS DIAPER POLYMER.
WE'LL SHOW YOU HOW THAT POLYMER 
WORKS.
TAKE THIS WATER, DUMP IT INTO 
THE POLYMER.
NICE BIG FELL SWOOP THERE TO 
STIR IT UP.
>> Jimmy: DID YOU EMPTY LIKE 100
DIAPERS TO GET THAT?
>> THAT'S A LOT OF WORK. 
>> Jimmy: ALL RIGHT.
I SHOULD JUST DO IT?
>> DUMP THAT IN THERE, ONE QUICK
DUMP. 
>> Jimmy: THIS IS JUST WATER?
>> YEAH, THERE IT GOES.
>> Jimmy: WHOLE THING?
>> YEP, WHOLE THING.
THAT GOES IN THERE. 
>> Jimmy: WOW, THIS KID HAD A 
LOT TO DRINK. 
>> THEN WE GIVE IT, I DON'T 
KNOW, FOUR SECONDS.
>> Jimmy: THAT'S WHAT'S IN 
DIAPERS?
>> THAT'S WHAT'S IN DIAPERS.
[ CHEERS AND APPLAUSE ]
>> Jimmy: CAN WE MAKE IT COME 
OUT?
WOW, LOOK AT THAT.
CAN I TOUCH IT?
OR IS IT POISONOUS?
>> NO, NO, DIG IN. 
>> Jimmy: WOW, IT'S WARM TOO.
OH, IT'S KIND OF FUN TO PLAY 
WITH.
>> IT IS.
>> Jimmy: CAN YOU DO THIS AFTER 
THE DIAPER HAS BEEN USED?
I WOULDN'T WANT TO WASTE ANY. 
>> THAT WOULD BE GROSS. 
>> Jimmy: ALL RIGHT. 
>> WE'RE NOT DONE WITH POLYMER 
SCIENCE.
THERE'S ANOTHER KIND OF POLYMER,
IT'S THE SAME BUT THE MOLECULES 
AR LITTLE DIFFERENT.
YOU WOULDN'T WANT TO USE THESE 
IN TYPERS.
WE'LL SHOW YOU WHY IN JUST A 
SECOND.
WE'LL DO THE SAME THING.
POUR THAT INTO THAT.
WE STIR IT UP.
THERE IT GOES.
>> Jimmy: IS THAT SUND COMING 
FROM THIS?
OR THAT IS COMING FROM THE BAND?
[ LAUGHTER ]
>> THIS HAS A LITTLE BIT OF A 
DIFFERENT REACTION.
THAT WE DIDN'T INCREASE THE 
VOLUME.
WATCH THIS.
IF WE START TO JUST POUR SOME OF
THIS POWDER THAT'S CREATED OUT 
OF THIS -- YOU'LL SEE THAT THIS 
EXPANDS.
THIS IS AN EXPANDING POLYMER.
IT WILL END UP TAKING WAY MORE 
SPACE -- 
>> Jimmy: THERE'S MORE, YEAH.
[ CHEERS AND APPLAUSE ]
>> KEEP GOING, KEEP GOING.
YEAH.
>> Jimmy: CAN I MAKE A SNOWBALL 
OUT OF THIS?
YOU CAN'T MAKE A SNOWBALL OUT OF
THIS.
BUT I CAN MAKE A GOOPBALL OUT OF
THIS.
LOOK OUT, GUILLERMO!
[ DRUMROLL ]
[ CHEERS AND APPLAUSE ]
>> Jimmy: SORRY ABOUT THAT.
>> POLYMERS ARE FUN.
ALL RIGHT. 
>> Jimmy: WHAT ELSE?
>> SHOULD WE DO A LITTLE FIRE?
>> Jimmy: YEAH, LET'S DEFINITELY
BURN THINGS, YEAH.
[ CHEERS AND APPLAUSE ]
>> THIS IS A LITTLE SOMETHING 
THAT MY YOUTUBE FOLKS WANTED ME 
TO EXPERIMENT A LITTLE BIT WITH.
SO THIS IS JUST GOOD 
OLD-FASHIONED BLOW TORCH.
GOT TWO STAGES TO IT.
A HALF SQUEEZE PUTS THE GAS OUT.
THEN THAT LIGHTS IT. 
>> Jimmy: OKAY. 
>> ALL RIGHT?
THERE'S SOMETHING IN SCIENCE 
CALLS A DEFLAGRATION WAVE.
A DETONATION ALSO WHEN YOU 
TRIGGER DINE NIGHT.
A DEFLAGRATION IS ALL THE FIRE 
THAT COMES OUT OF IT THAT 
SUPERHEROES RUN AWAY FROM.
THIS IS FIRE, DON'T DO THIS AT 
HOME.
ON THE OTHER HAND, IF YOU WANT 
TO TRY IT, IT'S SUPER EASY.
[ LAUGHTER ]
>> Jimmy: OKAY. 
>> GO AHEAD AND PUT THE END OF 
THAT IN THERE. 
>> Jimmy: OKAY. 
>> ALL RIGHT.
TURN THE GAS ON.
BUT -- HALFWAY.
NOW WE'RE FILLING IN WITH 
PROPANE.
WE'RE GOING TO SEE IF WE CAN 
CREATE A DEFLAGRATION WAVE.
TRIGGER IT OFF.
SQUEEZE IT ALL THE WAY.
>> Jimmy: WE'LL GET THE FLAME IN
THERE?
YEAH, YEAH.
YOU SEE THAT?
>> Jimmy: OH!
>> THIS IS A SELF-PROPAGATING 
WAVE THAT SHOOTS DOWN -- 
>> Jimmy: IT'S LIKE "STAR WARS."
[ CHEERS AND APPLAUSE ]
YOU COULD KILL BATMAN WITH 
SLSLIDE
SOMETHING LIKE THIS.
>> THAT'S KIND OF COOL.
I'M A MAKER SO I DECIDED TO SEE 
IF WE COULD RATHEMP IT UP A LIT 
BIT.
I MADE A LITTLE SHOULD GO FOR 
YOU.
COME ON OVER HERE.
WATCH YOUR HEAD THERE.
[ CHEERS AND APPLAUSE ]
YOU COME OVER HERE.
>> Jimmy: WHERE DID THAT COME 
FROM?
>> SO I FIGURED, YOU KNOW, LET'S
BEND THE TUBES A LITTLE 
BUSINESS.
THIS IS A DNA MOLECULE.
YOU KNOW WHAT DNA STANDS FOR IN.
>> Jimmy: DADDY NEEDS ALCOHOL?
>> DEOXY RIB BOW NEW CLAYIC 
ACID.
YOU HAVE A SMART CROWD.
[ CHEERS AND APPLAUSE ]
>> Jimmy: WHERE DID THEY COME 
FROM?
>> ALL RIGHT.
>> Jimmy: WE HAVE A DUMB HOST 
WHAT IS WE HAVE.
>> WE'RE GOING TO SQUEEZE BODY 
THOSE TRIGGERS HALFWAY.
ALL RIGHT, WE'RE GOING TO DO A 
QUICK COUNTDOWN.
WE'VE ALSO ADDED SOME MUZZLES TO
THE END WHERE EXTRA PROPAIN CAN 
GATHER.
HERE WE GO.
THREE, TWO, ONE -- 
>> Jimmy: WHOA!
[ CHEERS AND APPLAUSE ]
WHAT IF WE PUT SOME OF THAT SNOW
POWDER IN HERE?
WILL WE HAVE A REAL CRAZY 
EXPLOSION?
I'LL KILL YOU, BATMAN!
>> THE NATIONAL WEEK OF MAKING, 
AN ORGANIZATION THE NATION OF 
MAKERS, JUNE 16th TO 22nd, WE 
ARE ENCOURAGING ALL MAKERS OUT 
THERE, WHETHER A WOODWORKER, 
MAKE STUFF WITH GLUE GUNS AND 
CARDBOARD -- 
>> Jimmy: YOU MAKE 
METHAMPHETAMINE, FOR INSTANCE?
>> #NATIONOFMAKERS, ADAM SAVAGE 
FROM MYTH BUSTERS, WE'LL CHECK 
IT OUT AND HAVE A MAKER 
COMMUNITY. 
>> Jimmy: THERE WILL BE SEX?
>> I DON'T THINK SO. 
>> Jimmy: ALL RIGHT.
WHAT ARE WE GOING TO DO HERE?
>> MAFBLS DOWN FOR A SECOND 
HERE.
WE HAVE OUR OLD FRIEND.
DO YOU REMEMBER?
>> Jimmy: LIQUID NITROGEN. 
>> 320 DEGREES BELOW FAHRENHEIT,
198 CELSIUS. 
>> Jimmy: DO YOU WANT A SHOT, 
GUILLERMO?
>> REMEMBER, IF YOU POUR THIS ON
THE FLOOR, YOU GET THIS LIGHT 
AND FROST EFFECT.
YOU CAN WATCH IT DANCE ACROSS 
THE FLOOR. 
>> Jimmy: CAN I DO THAT?
>> GO AHEAD, SURE.
SEE THAT?
IT'S SO COLD IT DANCES ACROSS.
>> Jimmy: YES. 
>> WE'RE GOING TO USE THIS TO 
CREATE PROJECTILES.
>> GOOD. 
>> HERE'S WHAT I'VE DONE.
TAKEN YOUR TYPICAL FIVE-GALLON 
WATER BOTTLE.
AND WE'VE HACK THE IT AND ADDED 
A SIX-INCH BARREL. 
>> Jimmy: YEAH, BUT WHY?
WHY WOULD YOU DO THIS?
>> BECAUSE WE CAN.
WE'RE PUTTING 450 PING-PONG 
BALLS IN THERE.
AND THEN THE BACK WE HAVE A 
CHAMBER FOR SOME HOT WATER.
HERE'S WHAT'S GOING TO HAPPEN.
LIQUID NITROGEN GOES IN HERE, 
STEP ONE.
STEP TWO, HOT WATER GOES IN 
HERE.
THERE'S A VALVE THAT KEEPS THEM 
FROM MIXING.
STEP THREE, A CAP HERE.
STEP FOUR, A CAP HERE. 
>> Jimmy: ARE YOU LISTENING TO 
THIS?
>> THEN ON MY CUE PULL THIS 
LEVER.
THAT WILL MIX OUR LIQUID 
NIT
NITROGEN, OUR HOT WATER.
IT HAS AN EXPANSION RATIO OF ONE
TO 700.
IN OTHER WORDS WE'RE GOING TO 
CREATE PRESSURE.
IF ALL GOES WELL THERE'S A 
MEMBRANE IN HERE WHICH SHOULD 
SEND PING-PONG BALLS FLYING.
>> Jimmy: LET'S DO THIS. 
>> ALL RIGHT, HERE WE GO.
[ CHEERS AND APPLAUSE ]
ALL RIGHT, STEP ONE.
GRAB ONE OF YOUR LIQUID 
NITROGENS. 
>> Jimmy: GOT TO GET THE LIQUID 
NITROGEN, HERE IT IS. 
>> POUR THAT CAREFULLY INTO THE 
RED FUNNEL. 
>> Jimmy: THE WHOLE THING?
>> YEAH.
THAT'S GOING TO POUR IN THERE, 
OF COURSE IT'S STILL LIQUID, YOU
CAN SEE SOME OF THE VAPOR AROUND
IT.
THAT'S MOISTURE THAT'S IN THE 
AREA VAPORIZING.
>> YEAH?
>> THERE WE GO.
HOW'S IT GOING, IS IT BUBBLING A
LITTLE BIT?
IT TENDS TO DO THAT.
>> Jimmy: OKAY.
>> ALL RIGHT.
>> Jimmy: THAT'S IT. 
>> ONCE YOU'VE GOT THAT IN 
THERE, ALL RIGHT, YOU HAVE 
ANOTHER FLASK THERE, IT'S GOT 
THE HOT WATER IN IT. 
>> Jimmy: GOT IT. 
>> ALL RIGHT THAT GOES IN THE 
BACK?
>> Jimmy: GUILLERMO, YOU'RE NOT 
HELPING AT ALL. 
>> POUR THAT INTO THE CHAMBER.
YOU'RE GOING TO FILL THAT UP TO 
THE RED LIN.
>> Jimmy: THIS LOOKS LIKE 
CHILDREN'S TYLENOL.
>> ALL RIGHT.
YOU GOT A LITTLE CAP TOWARDS THE
BACK THERE.
>> Jimmy: OKAY. 
>> RIGHT UP TO THE RED LINE.
A LITTLE CAP IN THE BACK.
GO AHEAD, SCREW THAT ON. 
>> Jimmy: OKAY.
>> ALL RIGHT, PULL THE FUNNEL 
OUT.
>> Jimmy: WHAT?
>> Guillermo: PULL IT OUT?
>> YEAH, YOU GOT IT, GUILLERMO.
THAT'S GOOD. 
>> Jimmy: CAN YOU PROMISE ME 
WE'RE NOT GOING TO KILL ANN 
WILSON?
>> ALL RIGHT, LITTLE CAP GOES ON
THE TANK. 
>> Guillermo: HOLD ON, HOLD ON.
WAIT, HOLD ON.
>> YOU GOT THAT?
>> Jimmy: ALL RIGHT. 
>> YOU GOT IT, GUILLERMO?
>> Guillermo: GOT IT. 
>> ALL RIGHT.
HAND OVER HAND, ARE YOU READY?
PING-PONG CANNON IN THREE, TWO, 
ONE -- 
[ CHEERS AND APPLAUSE ]
>> Jimmy: WOW.
>> Guillermo: WOW!
>> Jimmy: HOLY COW.
LET'S LOOK AT THAT AGAIN.
>> Guillermo: THIS IS SO COOL. 
>> Jimmy: THAT WAS CRAZY.
[ CHEERS AND APPLAUSE ]
"SCIENCE BOB" PFLUGFELDER!
FIND OUT MORE ABOUT
ABOUT THE NATIONAL WEEK OF 
MAKING AT WEEKOFMAKING.ORG.
THANK YOU, SCIENCE BOB.
