You know that autopilot spin-around-three-times-like-a-cat-before-sitting dance that avatars do? Did you know that that actually triggers controls() events for scripts that have taken the avatar's controls?
You know how your avatar turns to face the object you're editing when you're in edit mode? Did you know that that ALSO triggers controls() events? That's sure a pain when you're trying to edit the thing that's taking your controls, and you're sitting on it!