We have three cats at my family's house. When fall started transitioning into winter, we took out the screen door in front of the glass door, and also cleaned up the whole house in general (including cleaning the glass door). Well, I guess we cleaned too well and the missing screen door didn't help because our fattest cat Cassie (she's been on a strict diet but it's not helping) came barreling around the corner, saw the "open" door, and ran face-first into it as fast as her little fat legs could carry her! I swear her body squished like a pancake like in a cartoon. That was funny enough for me, but then our second cat Sherman came barreling around the corner too, and while Cassie was sitting there completely dazed, Sherman did the same thing! At that point I was laughing so hard I was crying. Then our third cat Wildflower comes barreling around the corner, and while both of them are sitting on opposite sides of the doors dazed, she flies right into the door just like the others. At that point I was literally rolling on the floor, crying, and clutching my sides from laughing so hard! For the record, all three were completely fine and walked away - admittedly defeated - after a few minutes.