Chlorine makes my eyes irritated and watery until I have a good cry or otherwise manage to wash them out. Sun reflected off water, or indeed any other form of glare, makes me even more photosensitive than usual. The combination makes night driving after swimming a less than enjoyable experience.
As a corollary to the above, while I can usually cry at the drop of a hat, I can't seem to make myself do it to wash the chlorine out...
When I said I wanted to explore boundaries, I mostly meant my own psychological boundaries. However, I have now thoroughly explored the disadvantageous boundary condition that is the edge of the sofa, and can honestly say that I've been dropped on my head.
Mascot costumes look even less comfortable up close than they do at a distance.
I seriously need to make taking a multivitamin part of my daily routine.
johnstevensaul may not shock me any more, but he can still surprise me.
Predictability is not one-sided.
 For those who aren't familiar with the term: one variation on gaining experience points (rewards and advancement) at the end of a roleplaying session is the learning curve, where at the end of the session the GM asks each of the players what they learned over the course of the session, and awards bonus points for good answers (in his/her sole discretion). Answers can be in character or out, serious or funny, depending on the game, the player, and the GM. The idea is built into a couple of systems, but I've seen it used as a house rule in a number of others.