http://www.digitaljournal.com/article/38363

MIT Interactive Whiteboard Simulates Real-Life Engineering Environment

Posted Oct 5, 2006 by Allan
This is a really cool video where a prof from MIT shows how a computer can recognize simple line drawings on a whiteboard. The computer can process it to make it animate with real-life gravity, springs and movement.
This doesn't sound very exciting to watch, but I was blown away. Very interesting.