Here's something that most people don't ever realize, and I do:

You know those times when you stand completely confused and dumbfounded by a situation and have no idea what to do? Your mind is totally blank, and there is no response pre-programmed into you for that situation. Those are the times when you're actually thinking.

Take a tally, make a note. I imagine for most people it doesn't happen very often.

For me it happens roughly every fifteen seconds as I am amazed and struck dumb by some new form of stupidity displayed around me.