I had a cramp in my mid to lower abs a couple of weeks ago. This was definetly not from something I eat. I could feel that it was the muscle that cramped up and not just my stomach not feeling well. They got so tight that I couldn't stand up straight for a few seconds, until it went away.
Lately my forearms and hams have been cramping or coming very close to it.
I'm on sust and eq right now, plus I drink about 6 litres of water (over a gallon for you non-metric guys), and a couple of bananas a day.