[quote=@KriticalKrab]
If he was punched or flash banged would that sever his mental connection? To be honest this whole possession thing seems OP, though I know you made it so it's only inanimate objects, it still seems pretty strong. Also, where would you find nothing to possess?
[/quote]

The premise I was going for is that Spook and Boo could not control things that were extraordinarily large, for example they'd be able to control things from toy robots up to a car, and that's if they controlled it together. Also, yes, anything that would throw a person off would probably relinquish his link to them, for however long he is disoriented.