How you know you might not be fully awake

This morning I was on my way to work and had the annoying experience of having a hair stuck between my eyes and my glasses. No matter how I wiggled my nose or whipped my head around, I couldn't get it out. So, while I was driving down highway 62 I decided to take off my glasses and get the hair out. As soon as I looked up I realized that may not have been the best idea I've ever had. Honestly, I don't know what train of thought led up to me taking of my glasses while driving. I obviously wasn't thinking yet, and so I just did it out of habit. Though you think the steering wheel, the stick shift, and the roadside whipping past my window would have reminded me I was driving a moving vehicle and that seeing is pretty important.