Seriously, usually I only "bonk" if I'm doing a sustained effort for several hours. I kind of have to force myself to eat in the middle of the day. Sometimes, I split a workout before and after lunch, if it's dragging or gets interrupted too much. For a bike ride less than two hours, I usually don't take any snacks. For low intensity stuff, I am (or used to be anyway) like a camel. Just keep going and going. I didn't realize it was weird until I started hiring guys to help around the farm. They'd get this haggard look and ask, "Hey Boss, when are we gonna take a break?"
I do remember getting super-bonked one time though, hiking in the Olympic Mountains. Due to circumstances, I had to hike twice as far as planned that day. My body just ground to a halt.
I flopped right down in the middle of the trail and dug some stew out of my pack and cooked and ate two rations before I could move again.