Recently I've noticed that occasionally my headlights will flicker. But it does it so quickly that I had convinced myself that it was just a trick of my mind. Then this morning I was going about 50mph in a 45, I saw a cop, did a quick speed check to make sure I wasn't about to be pulled over, and to my suprise, I was going and indicated 80mph! But only for about one second. My speedo blipped from my actual speed (~50) to ~80 and back down to 50 in about a second. Quickly enough that I again thought, "I've been eating too many coco puffs or something." But then again maybe I havent been... So is there anything that might make my lights flicker and speedo blip?