Bonking is a term that cyclists and runners use to describe what happens when your body is short of the energy it needs to for you to accomplish what you are doing. It is like having your blood sugar get too low. Symptoms are crankiness, lethargy, not feeling like doing anything, and not being willing to admit that immediate replenishment is needed.
This happened to me today. I did eat, but not enough for the work I was doing. Apparently, when you are riding a bicycle cross country it is ok to eat pretty much whatever you like and as much as you like. I eat very healthy most of the time so I had to remember to change my eating habits in proportion to my what I was doing. After a long day with not as much progress, it was 9 miles outside of Palestine(palace-teen)when became aware as to what was going on. I ate a can of salmon, some peanut butter and took a nap under an old beautiful oak tree by the side of the road. When I woke up Whitney Houston's 'Somebody Who Loves' me was playing in my head so I felt that was a good sign.
Total of 45 miles today, and staying in my tent again at an RV Park. I can hear nearby trains and trucks from the highway, but I fall asleep quickly.