Wow, Bud, a rear end cramp. I've had a lot of cramps on centuries, but never a butt cheek cramp. Oh well, all one can do is suck it up and know the next century will be better.

On the first century that I did on my Aero, I had a 20+ mph average when I cramped in the groin so bad, that I had to barely limp in the last 15 miles. A group of elderly ladies passed me and decided that I was going to be their pet project for the day. They even stopped with me when I cramped so bad a few times that I had to get off the bike. If I'm 58 and I'm calling them elderly, you can see how embarrassing it was but I did make it in.