I do this all the time when I blink and wonder why the lights flickered. I used to verbalize my confusion and ask why the lights flickered. No one else saw it flicker and it took me awhile to realize that the flicker was me blinking. In addition, when the lights flicker, I usually blink. (To adjust for new light levels? You tell me...) Now, when the lights flicker or I blink I am stuck wondering which came first.