When I was in early high school, I was quite heavy (I still am, but now I delude myself into saying I'll do something about it). In any case, I was once playing tag with a group of friends in a lightly wooded area of our school campus, and ran smack into a small tree. This would have been unremarkable (a bunch of us tripped, fell, hit things, etc.) except that the tree promptly uprooted and crashed down to the ground, fast enough that I actually ran through it, and stumbled on for perhaps twenty feet before losing balance.

Somehow, that earned me the appellation of Rhino. It wasn't until much later in my life that I learned that Rhinoceroses tend to have sex for around an hour, having an orgasm every forty seconds. Had I known that at the time, I would have been much less annoyed.