I always manage to slam my head from side to side on RnRC, which makes my ears red and bothersome for a few hours.
A few years ago we went to TL. I woke up the next morning with pink eye. We were traveling home that day, so when we got home, I went to urgent care for a prescription. The doctor actually asked me if I had been in a public pool or water park recently, and attributed my pink eye to that. He said it's pretty common and evidently, it's a breeding ground. No way to know for sure of course