None of the cats I have ever owned did that so I believe your kitty was a one-off. If the goal was to gross out a predator, he gets a gold star for effort. Maybe he was half or quarter human? Many people have been known to shit themselves, after all. Or, even part chinchilla... Our chinchilla produces an endless stream of raisins. Happy, mad, sad, scared or excited, there is always a nugget for everyone.

The closest I had was a dog that would pee all over the place when he got excited or shit at the top of our stairs when he was mad at me. He was a Chihuahua, so he was always mad at me.