did it a couple of times...was quite funny, thought my mobile phone was writing in arabic, and had shrunk to about about a quarter inch long. Walked into a room and saw some dudes neck stretch about 15 feet and his head turn into a tear drop shape which was wierd. then kept thinking everyone i talked looked like a really good friend of mine, only to blink then realise it wasn't them at all.
like i said quite funny but a bit of a waste of time.