Walking my dog in the woods and she found a plastic bag, picked it up in her mouth and starts parading it around to show it off.
She got a little too excited and started running, picked up too much speed, the bag blew up over her eyes and she ran flat into a tree.

I was tossing toys over my cat's head and watching him do backflips trying to catch them. Eventually, he ended up near his bowls and when I threw another he did a beautiful backflip and landed face-first into his water bowl! Splashed nearly all the water out as he started scrambling and jumping away from the dish. One of the few times I wish I had been recording!