One also must be very careful about disturbing wild animals. If they are rabid or sick in any way, their behavior can be very unpredictable and, yes, they can be nasty, in several senses! It is best to let professionals remove wild animals if at all possible. And not all possums will "play dead" when approached... many will snarl and bare very sharp teeth, especially when defending young. They are common carriers of rabies, too. Be careful!!!