Bats. I have two stories.
One is a friend from years ago who is the second unluckiest person I ever met - the first survived two plane crashes. He was just sitting on a rock out on a lake not far from his campground (smoking a doob) minding his own beeswax and a bat got tangled in his hair - and man he had real caveman hair, more than sufficient to entangle small animals. That necessitated rabies shots. oof.
The other is me and the wife sitting on our couch half asleep when suddenly Grandpa Munster comes flapping up out of the stairwell. Crap !! Cue the banjo music or yakkity sax.
I traspped it by turning on every light we had upstairs and turning them all off downstairs and he eventually got the message. I went down and found him spread out on some sheetrock stacked against the wall so I slipped on a pair of welding gloves and carried the docile little feller outside and put him on the deck. As I turned around to go back in I heard a whack and he was suddenly gone. Again, oooof. But, that's the Beautiful Cycle of Life for you