Sometimes when I put undue pressure on a muscle or, well, I don't really know why it happens most of the time, but occasionally I get these muscle spasms for ten seconds or so. They kind of tickle, but they're mostly just amusing. I've been typing up some documents for quite a while now, and I've been leaning with quite poor posture while doing so. I lifted my right arm just moments ago, which was leaning against the right side of my body, and I got one of those. My right manboob started twitching on its own. It was quite the show. You should have seen it.