I'll never forget my one and only bonk. I was about 13 and foolishly rode about 20 miles on a broken beach cruiser in 90 degree weather without any water. Thank god my brother was with me or else I think I would have passed out. He carried me to a 7-11, cleared out one of the refrigerators, and laid me half way in it until I recovered about an hour later. It's an absolute MISERABLE feeling.