Why does water stay in a cup when the cardboard is removed?

[Emlett]

Homework Statement

I recently saw a youtube video in which someone filled a cup with water and created a vacuum with a piece of cardboard. Then, he transfers it to a table and removes the cup using a twisting motion. The end result is the water retaining the form of a cup. Is this actually possible? Also, can you explain why or why not?

Here is the link for the video:

http://www.youtube.com/watch?v=7ctaA2mERzI

Homework Equations

The Attempt at a Solution

I was unable to find another video that showed a replication of the trick despite being the video being so popular. Also, I have noted that his other uploaded videos are demonstrations of his CG work.

 

[Phrak]

Watch very closely at frames 1:46 to 1:48. You have to have a small statue of an elephant and a bottle of cold medicine nearby or the trick won't work. This is very obviously a viral video to see how much of a mess he can cause in the form of wet kitchen floors across the globe. Be sure to have a tiny elephant and some cold medication handy to prevent this from happening.

In addition, skills at splicing clips together, a little photoshopping, and casting very clear and cold ice inside a glass cup are a must. Above all, don't forget the twisting motion.