I was walking along our back fence one morning at the same time a momma 'possum with two babies on her back was walking along the other side.
I don't know who was more startled.
I was so fascinated with them I forgot to take their picture until momma was scurrying away. By the time I got the shot, one baby had fallen off and was trying desperately to get back on. The other was well on it's way to falling off. That's OK. Sometimes it is more fun to just watch.