Ok so I am driving home tonight and truck is feeling great with the cold air it's getting. Not many people on the road and some punk in an SRT-4 comes roaring up. He gets slightly ahead of me and slows down. Even knowing that he would kick my a$$ especially on the freeway at the speed we were cruising at I still drop it into fourth and mash the gas and boost past him. He caught up pretty quick and just as he passed me he hit his brakes enough to make me think that he saw a cop so I was at about 4500rpms in 4th almost at the speed limiter and immediatly let off the gas then slightly got back on it and heard a pop. It sounded almost like I hit something and it didn't sound good. I think it was a backfire. Anyway there was no cel and the truck drove fine the rest of the way home. I was scared to get on it again, but I did just to make sure everything was ok. Truck felt the same and sounded the same too. So my question after this novel is... has anyone else experienced a backfire? Also does that sound like what it was?