Toy Story characters at Disney Parks used to drop to the ground when people yelled "Andy's Coming!"
This is, of course, a reference to the way toys act in the Toy Story movies when their owner, Andy, shows up.
Although it used to be true, Disney stopped the practice for safety reasons. This cool 'easter egg' was also a victim of sudden Internet fame.
Apparently everyone found out about it at the same time and people yelled at cast members too many times per day, so they decided to stop doing it.
