>> I'M GREAT.
>> Jimmy: WONDERFUL.
SCIENCE BOB, THANK YOU FOR BEING
HERE, FIRST OF ALL.
YOU CAME OUT FROM BOSTON.
>> YEAH.
>> Jimmy: I WANT TO ASK YOU ONE 
TEACHER QUESTION.
>> YEAH.
>> Jimmy: IS IT -- TO BE A 
TEACHER THE DAY AFTER HALLOWEEN,
DO THE KIDS GO NUTS BECAUSE OF 
ALL THE CANDY?
>> YEAH, IT'S A BEAST.
AND THEN WE HAD THE WORLD SERIES
SO THEY WERE UP ALL NIGHT AND 
THEN WE HAD THE CANDY, SO HERE I
AM IN L.A.
>> Jimmy: THAT'S WHY YOU TOOK 
THE WEEK OFF.
YOU DID THE RIGHT THING.
THEY'VE GOT A SUB RIGHT NOW.
THEY MUST BE REALLY BUMMED WHEN 
THEY HAVE A SUB WITH ALL THE FUN
STUFF YOU DO.
WHAT DO WE HAVE IN STORE 
TONIGHT?
>> WE'RE GOING TO DO A LITTLE 
THEY W
THERMODYNAMICS.
HERE'S A LITTLE BIT ABOUT 
THERMODYNAMICS IS THAT AS 
THINGS -- SOMETHING THAT'S HOT 
AND SOMETHING THAT'S COLD IS 
JUST HOW HOT THE MOLECULES ARE 
MOVING SO WE HAVE WATER BOILING 
IN HERE BUT THAT HEATS UP THE 
AIR AND THE AIR EXPANDS AND THE 
AIR THEN COMES OUT OF IT BECAUSE
IT NEEDS ROOM TO MOVE AROUND.
WE TURN THE HEAT OFF, THE AIR 
COMES BACK IN.
>> Jimmy: YES, WE ALL HAVE 
STOVES.
>> RIGHT.
SO I'VE GOT A LITTLE DEMO HERE 
WHICH I THINK WILL HELP US 
APPRECIATE JUST HOW MUCH AIR 
LEAVES THE CONTAIN EER BECAUSE 
IT'S VERY HARD TO TELL.
I'M GOING TO TAKE THIS OFF THE 
HEAT BUT THEN I'M GOING TO TURN 
IT UPSIDE DOWN AND PUT IT IN 
THIS CONTAINER OF ROOM 
TEMPERATURE WATER AND WE SHOULD 
SEE A VACUUM AND MAYBE GET SOME 
OF THIS WATER TO MOVE UP INTO 
THE FLASK, WHICH WILL SHOW US 
HOW SPREAD OUT THE AIR IS.
>> Jimmy: IS THIS THE WATER FROM
THE TOILET IN THE -- WHY IS IT 
BLUE?
IS THERE A REASON FOR THAT?
>> IT'S THE BLUE OF SCIENCE, 
YEAH.
>> Jimmy: I SEE.
IT'S SCIENCE BLUE.
IT'S THE BLUE YOU HAVE TIE DYED 
YOUR LAB COAT WITH.
>> HERE WE GO.
REMOVE THAT TOP, TURN IT UPSIDE 
DOWN.
KEEP AN EYE ON IT.
KEEP AN EYE ON IT.
HERE IT COMES, RISING.
>> Jimmy: WHOA!
OKAY.
I GOT ALARMED THERE.
LOOK AT THAT.
>> YEAH.
BUT WAIT.
>> Jimmy: IT'S KIND OF 
BEAUTIFUL.
>> HERE'S WHAT THIS MEANS.
>> Jimmy: WHAT DOES THIS MEAN?
>> THE AMOUNT OF AIR THAT YOU 
SEE IN THERE, WHEN IT WAS ON THE
HEAT, WAS TAKING UP THE ENTIRE 
CONTAINER.
THAT'S HOW MUCH IT SPREADS OUT.
>> Jimmy: TO ME, THE EXPLOSION 
PART WAS MORE INTERESTING.
>> ALL RIGHT.
>> Jimmy: ALL RIGHT.
>> WE'RE GOING TO DO A LITTLE 
PHYSICS DEMO.
>> Jimmy: ALL RIGHT.
>> SO NORMALLY I COME OUT AND DO
A LITTLE DEMONSTRATION AND I 
GIVE A LITTLE EXPLANATION.
>> Jimmy: RIGHT.
>> I'M GOING TO DO A LITTLE 
DEMONSTRATION BUT NO EXPLANATION
BECAUSE I DON'T KNOW HOW IT 
WORKS.
>> Jimmy: YOU DON'T KNOW HOW 
THIS PARTICULAR PROJECT WORKS.
>> I DON'T BUT I DON'T FEEL BAD 
ABOUT THAT BECAUSE I'VE SHOWN IT
TO FPHYSICISTS WHO HAVE GIVEN ME
DIFFERENT ANSWERS.
>> Jimmy: YOU'RE SCIENCE BOB.
IF YOU DON'T KNOW HOW IT WORKS, 
YOU'RE JUST BOB.
>> YOU'RE RIGHT.
>> Jimmy: YEAH.
>> SO, IT'S REALLY SIMPLE 
SET-UP.
I'VE GOT TWO WHEELS THAT I 
PICKED UP AT A HOBBY STORE.
A LITTLE TUBE HERE, COPPER TUBE.
THOSE ARE CONNECTED TO SOME DC 
MOTORS AND THEN I HAVE A LOOP OF
STRING HERE WHICH IS RUNNING 
THROUGH THE WHEELS.
>> Jimmy: THIS IS WHAT YOU 
THOUGHT OF?
>> IT WAS ACTUALLY BASED ON A 
TOY THAT I CAME ACROSS YEARS 
AGO.
>> Jimmy: OKAY.
>> SO I'M GOING TO TURN THIS ON 
AND WE'LL SEE WHAT HAPPENS TO 
THE STRING.
CHECK IT OUT.
>> Jimmy: OH.
>> SO WE GET THAT.
IT'S KIND OF COOL.
THAT'S COOL.
AND THEN YOU START INTERACTING 
WITH IT, AND YOU GET THESE KIND 
OF WEIRD SHAPES, BUT IT GETS 
EVEN KIND OF WEIRDER.
IF I INTERACT WITH IT DOWN HERE,
YOU SEE HOW THAT WAVE MOVES UP.
THE STRING IS GOING THIS WAY.
WE DON'T KNOW WHY THE WAVE MOVES
UP.
>> Jimmy: REALLY?
YOU GUYS HAVE STUDIED THIS AND 
NOBODY SEEMS TO KNOW.
>> I HAVE ASKED MANY, MANY 
PEOPLE AND I GET DIFFERENT 
OPINIONS.
TRY THIS OUT.
IT'S KIND OF COOL.
JUST MOVE IT BACK AND FORTH.
>> Jimmy: ALL RIGHT.
>> YOU CAN STEP OUT.
>> Jimmy: WHAT IF SOMEBODY 
TOUCHES IT?
DOES IT GO DOWN?
I CAN LASSO GUILLERMO WITH THIS 
THING.
WHAT IF WE CROSS THE STREAMS 
LIKE "GHOSTBUSTERS"?
WILL WE ALL BE SENT TO ANOTHER 
DIMENSION?
>> WIGGLE IT AROUND AND MOVE IT.
IT GETS REALLY WEIRD.
>> Jimmy: THAT DIDN'T SOUND 
GREAT, BOB.
WHAT IF YOU PUT A SPAGHETTI 
NOODLE IN HERE?
THIS WOULD BE A GREAT WAY TO 
FEED THE KID, WOULDN'T IT?
>> ISN'T THAT WEIRD?
IT'S TOTALLY WEIRD.
>> Jimmy: IT'S WEIRD.
>> I'M GOING TO ACTUALLY GIVE 
THE INSTRUCTION SO PEOPLE CAN 
BUILD THIS.
I'LL PUT IT ON MY WEBSITE.
>> Jimmy: PEOPLE CAN BUILD THIS 
AT HOME.
I WONDER IF ANYBODY WILL 
ACTUALLY DO THAT.
>> I HOPE SO.
THEY'RE GOING TO DO IT.
ALL RIGHT.
>> Jimmy: THEY ARE, IN 
SCIENTIFIC TERMS, WE CALL THAT 
BEING FULL OF [ BLEEP ].
I FEEL LIKE THIS IS GOING TO BE 
AN OLYMPIC EVENT IN ABOUT TEN 
YEARS.
OH, IT'S FUN, THOUGH.
>> IT IS FUN.
>> Jimmy: BUILD ONE AT HOME.
OH, NOW IT'S DEAD.
ALL RIGHT.
WHAT ELSE DO WE HAVE, SCIENCE 
BOB?
>> SOMETIMES IF YOU'RE 
SCIENTIFICALLY ILLITERATE, YOU 
CAN EXPLOIT SCIENCE JUST TO 
ENTERTAIN YOURSELF SO WE'RE 
GOING TO DO A LITTLE BIT OF THAT
TODAY.
IT'S AFTER HALLOWEEN AND THAT 
MEANS THAT PUMPKINS ARE, LIKE, 
HALF PRICE, SO WE TOOK ADVANTAGE
OF THAT AND WE'RE ACTUALLY GOING
TO DO A LITTLE BIT OF A CLASSIC 
CHEMICAL REACTION.
ACTUALLY, THE VERY FIRST 
DEMONSTRATION WE EVER DID 
TOGETHER ON THIS SHOW.
AND HERE'S HOW IT WORKS.
WE'VE GOT SOME PUMPKINS AND 
INSIDE OF THE PUMPKIN IS A 
LITTLE CONTRAPTION THAT LOOKS 
LIKE THIS, AND WE'RE GOING TO 
HAVE TWO CHEMICALS IN THIS 
CONTRAPTION.
ONE IS GOING TO BE HYDROGEN 
PEROXIDE.
THE OTHER IS GOING TO BE SODIUM 
IODIDE.
WHEN WE PULL THIS STRING, THE 
TWO WILL MIX TOGETHER.
>> Jimmy: AND WE'LL ALL BE 
KILLED.
>> THAT WILL CREATE AN 
EXOTHERMIC DECOMPOSITION 
REACTION, BASICALLY, WE'RE GOING
TO BREAK APART MOLECULES.
IT CREATES A LOT OF OXYGEN VERY 
QUICKLY.
WE'RE GOING TO PUT A LITTLE BIT 
OF DISH SOAP IN THERE.
WE SHOULD CREATE SOME NICE FOAM 
TOGETHER.
THE OTHER THING WE'VE DONE IS 
PUT HOLES IN THE TOP OF THESE 
PUMPKINS TO GIVE THE FOAM A 
PLACE TO LEAVE.
>> Jimmy: OKAY.
ALL RIGHT.
>> SO COME OVER HERE, VERY 
CAREFULLY, WATCH OUT FOR THESE 
STRINGS.
STEP UP ON THE PLATFORM HERE.
AND WE'RE GOING TO -- 
>> Jimmy: WHY ARE WE SO FAR 
AWAY?
IS THIS DANGEROUS?
>> WE'VE NEVER DONE IT WITH THIS
MANY BEFORE.
>> Jimmy: OKAY.
>> ALL RIGHT.
HERE'S WHAT WE'RE GOING TO DO.
WE'LL DO A COUNTDOWN AND THEN 
WE'RE JUST GOING THE PULL THE 
STRINGS RIGHT OUT OF THE 
PUMPKIN.
ARE YOU READY?
>> Jimmy: YEAH.
>> THREE, TWO, ONE, PULL, AND 
TRUST THE SCIENCE.
TRUST THE SCIENCE.
THERE WE GO.
>> WOW.
KIND OF BEAUTIFUL.
CAN WE LOOK AT THAT AGAIN IN 
SLOW MOTION?
WOW.
OH, WOW.
THAT IS -- 
>> BEAUTIFUL.
>> Jimmy: THAT -- WOW, THAT'S 
PRETTY GREAT.
THAT'S SOMETHING I'D LOVE TO S
