That's horrible about your cat, I'd say you were devastated. It's easy to forget that they're small, frail creatures. Sometimes when I'm playing around with my cat he gets kind of uncomfortable, and I have to check myself and remember that to him, I'm a massive powerful creature that could easily unintentionally harm him. At least your cat got a good home while he was alive, and was cared for. Imagine that only recently, children used to get seriously ill all the time and die young. It was normal. Have no idea what that would be like. Empty seats in the classroom.