Visible crew/equipment: Towards the end of the film you see the long haired baddie grab Milo by the hind legs (just before Milo puts the mask on). As Milo starts to change you can just about see the baddie who is holding his legs, except he is now a different person with brown curly hair, nobody who is seen prior or following this shot. Presumably he is the dog trainer. (01:23:15)
Visible crew/equipment: When Cuban Pete and the police crowd start doing the boom-chickie line move, the boom is moving around in the very top of the screen.
Visible crew/equipment: The first close-up of Dr. Neuman shows a big triangular object reflected on his glasses, like a camping tent of some sort. Maybe filming equipment covered to hide it from the reflection. In any case, nothing to do with the opposite angle of a couch.
Visible crew/equipment: After a masked Carrey leaves Landfill Park, an aerial camera and person swings back and forth near the top of the screen in the background during the conga line dance.
Suggested correction: Those aren't camera people, they are supposed to be tactical police officers on a rope line who get involved with the singing/dancing by swinging and doing some aerial flips. We'll ignore that the ropes just go up into the sky, but that is the kind of comedic movie this is.
Visible crew/equipment: When Stanley throws the mask out of the window and it comes back in, there is a low shot of his bed. The shadow of the camera operator is on the bottom of the frame. It looks like the operator is moving.