Don't know if this has been posted before?
Very clever, but totally useless!

http://www.chilloutzone.de/files/player.swf?b=10&l=197&u=ILLUMllSOOAvIF//P_LxP92A42lCHCeeWCejXnHAS/c

Students: I recognise the maths text book on the floor about 14 seconds in!!

Still, suppose it's more productive than drinking all day

I hope they where students, that was an exam piece and they got a damned good mark!