It's a particularly nasty spur which'll really piss off the horse. (Bronco riding?)

I was in the second grade. They'd set up a TV in an empty room across the hall, and we all went in to watch. They'd really pumped up the "There's a teacher in there!" thing, so we were all more emotionally involved than we would have been otherwise.

I don't remember much about our reaction (we were, of course, shocked and sad, but I don't know that anybody cried) or how my teacher handled it.