My cats are pretty sedentary and the only things I can think of are pretty tame compared to falling out of windows.

Toby thought he wanted outside one time and he went out on the front porch when my sil came in. A car started next door (we lived in apartments with the parking right at the door) and he wanted back in...NOW. He flung himself to the upper half of the screen door and when I tried to open it and get him, he fell and tried to go under the door and got stuck. Twenty-six pounds of cat does not fit in a 1½ inch space. He was terrified and I was working up a sweat fighting him the whole way. I didn't let him go for half the night because if that car hadn't started, who knows how far he would've gone before I noticed he was missing.
He's never tried it again, lol.

Dixie has a wonky toe from counter walking. She bumped some frozen ribs and when she jumped down, she took the ribs with her and they smashed her foot. I was bawling because it was totally my fault, I had two packs stacked on the counter...if I had laid them flat, it wouldn't have happened. A visit to the vet and when they tried to set it, she literally mauled the poor guy. He came back with her and he had scratches on his face, arms, neck...everywhere you can think of. I felt so bad but he just laughed it off saying he doesn't feel it anymore...she did that on the way in to the x-ray and here it was 30 minutes later. Her toe is a permanent thing now and it makes her foot real wide and the knuckle feels weird but you wouldn't know it's broke to see her playing and speeding through. I still have a hard time talking about it.

Before I poofed Churchy, he got in a fight with a stray that resulted in his testicles getting clawed open. Maybe that's too much info but it was really terrifying. It made him really ill, he had diarrhea and he went into shock. I couldn't bring him in because of the mess he was so I stayed outside, cleaned him up with the water hose and doctored him the best I could. After I made a bed on the porch for him, I went to his crappy owners and told them about it...they said " How bad is the other cat...maybe they won't mess with each other anymore." I was livid and made up my mind that he was going to be my cat and be safely inside from them on but it wasn't so easy. When I did get him and had him checked and neutered, the vet said he's surprised he didn't suffer infection with as deep as the wound went.

Maybe Churchy's story wasn't so tame...