this.
Except for last fall, I think I might have gotten giardia or something camping because I drank strait stream water (can't remember why, I guess I was just really thirsty). Anyway, it made me have to go 3-4 times a day. It was right during cross country season too, which sucked so much. I couldn't run without having to take a dump, so I just pretended I was really tired and walked or said I had cramps.