A friend of mine and I once trapped a possum in a trash can, we were in college at the time and a several foreign students, from the middle east, walked by and became very interested as to what we were doing. We convinced them it was giant north american rat, when they looked in to the trashcan at the possum it hissed and they backed off and then walked away eyes as wide as silver dollars. I ended up putting the possum in someones car. I had heard it would crawl up under the dashboard and stay until it died. Don't know if it worked. Ah, good times.