I was at the track one night with my head under the hood of the car, and this dude in an F350 was goin around and blowin one of these things, I could tell he was a couple hundred yards away. He crept up behind me and scared the **** out of me. I turned around and put my 3/8" ratchet through the driver's window. I would have destroyed that motherf**ker if he hadn't sped off.