I used to play racquetball with a friend of mine at courts he had at his apartment complex. Not my best sport, but what the hell. It was a private court, but residents could bring guests. It was enclosed by glass, so I mistakenly thought it was soundproof.
Anyway, he was a racquetball nut, and I was kind of new to it. I was winning one of the games 13 to 2, or something like that. We were playing to 15. I thought I had it won, but then he started coming back, and that's when I lost it. By the time he had completed his comeback and beaten me, I had stomped, punched the wall, and yelled just about every obscenity there is, at the top of my lungs, much like a three-year-old having a tantrum.
I hate to lose.
The next day my friend told me that there was a sign outside the courts, prohibiting guests from playing on the courts.
I was a very poor sport. I'm better now, but still, I do regress back to being a complete idiot every once in a while.