Quote Originally Posted by CorsairMac
For me bonk is a slow onset starting with fatigue and cold sweats and then goes downhill from there.
Me too. My one an only real bonk occurred due to a combination of 3 things:

1) weather too hot and I wasn't used to it
2) very poor fueling that day...(very, very poor choices)
3) poor conditioning for that particular ride (elevation, speed, distance, etc)

I was also quite inexperienced, and I didn't immediately realize what whas happening to me. I know that I am capable of 'willing' my body to do things I wouldn't have thought possible, and that day, for the first time in my entire life, it got to a point where there was no control. My body flat out failed me and it scared the crap out of me. Luckly, I wasn't alone and my riding buddies helped me take care of myself.