I've been that bear a time or two. I get annoyed when someone decides to show their might to lower-ranking students for ego's sake, especially when I don't have the authority to call them on it. I'm the nice, quiet guy (okay, maybe not so quiet...), until I'm not. It's normally not something others in the school would even notice. Most students can barely tell when one black belt gives another a double-leg sweep, versus a standard single-leg sweep, much less how hard the throw actually was.
Rawr