Here’s a great site specific piece by Supakitch. It looks like a sweet bear during the day, but at night when the green subway entrance light comes on, it looks totally sinister.
Related posts:
Improv Everywhere’s No Underwear Subway Ride
Improv Everywhere’s No Pants Subway Ride 2010 Video
Improv Everywhere: Star Wars Subway Car Prank
No one thought it was a bomb?