Music
The illusion starts with an aerial view of
the Great Wall
and David saying that the wall was the
only man made object
visible from the moon. As the wall is only about 10 meters wide...
This is laughable. This is a very old
although famous illusion which has been
performed only once.
People who haven't seen it, assume that
he just walked up to the wall and
started walking through it.
The actual illusion was not quite as
impressive as that.
The magician walked up some steps onto a
box-like structure
with a raised platform. White shades
were
pulled down to hide the magician and
a light shone, which showed a shadow
walking through the wall. The shades were
pulled up
and the magician had completely vanished.
The steps were pulled away...
the platform box was also taken away
a mobile camera then panned over to the
other side of the wall
where steps and a raised platform had
been installed.
After seemingly having no trouble going
through solid rock,
he had trouble getting through the final
screen.
The screens were raised and the magician
was seen
in shadow coming through the wall. When the screens were lowered,
there was the magician. "How was this done?"
The simple answer is that he was hiding
inside
either the steps,
or the raised platform.
The steps and platform on both sides of
the wall,
not only looked the same, they were the same.
with David inside the entire time.
"How did those steps and platform
get across the wall." The panning camera
conveniently for the magician, didn't
show how it was done.
It was either by helicopter...
of a hole in the wall or a gap in the
wall.
Remember the Great Wall runs down the
middle of China
so it has to be many gaps in the wall
or holes
to get through, so that people who live
in the vicinity
aren't trapped on either side of the wall.
How come we saw the magician shadow
apparently walking through and coming
out of the wall.
Well, shadows are misleading,
they depend on which direction the light source is.
So what you see is nowhere near
what it is. Finally, how about him 
poking through the wall, how was this done?
It was obviously the two people standing
next to the shade who
used their hands to poke through the wall
and hold up a mask.
 
