Boink!

According to Wikipedia, "the bonk" is when "in endurance sports, particularly cycling and running, hitting the wall or the bonk describes the condition when an athlete suddenly loses energy and becomes fatigued, the result of glycogen stores in the liver and muscles becoming depleted".
This is a condition that can be extremely serious. So, I'm adopting a new term - "the boink".
Last evening I joined a group that goes for a 15-20 mile ride every Tuesday and Thursday evening from a location near our home. I've ridden with this group before and really enjoyed it. My expectations of really keeping up and having a great ride were high after the "Boot Camp" experience.
We got off to a great start and I was feeling great. Then, about 5 miles in I "boinked". It did not seem to be serious but I felt like my bike was glued to the ground. Rather than stop, I rested a few minutes, drank some water, cut off a few miles and took it easy getting back to the car - probably went only about 14 miles. That was a disappointment, but I'm trying to listen to my body. This whole thing gets stupid if I go into cardiac arrest.
When the rest of the pack got back, they reassured me that it happens to everyone and that my long ride over the weekend had probably taken more out of me than I realized. They encouraged me to keep at it. And I will. A little dose of reality.