There are all kinds of medical oddities that many of us share but very few of us understand. Like what the 'funny bone' really is, why yawning is so contagious, and the science behind a 'brain freeze.' Well WebMD is clearing up those mysteries, along with a few others such as whether or not you can pop an eye out if you sneeze too hard (you can't, by the way). The biggest surprise to me? Bed bugs. I always thought they were real, but I was under the impression that they were some kind of practically microscopic organism that didn't actually bite. But in reality they're 1/4" long (that's HUGE!), reddish colored, and they DO bite. Yuck!!!