One of my biggest pet peeves is when other cars pace me for no apparent reason. This was occurring on a recent weekend trip in Mexico. An Altima, Audi A5 3.0T and myself were traveling down the highway and both were pacing me after a few minutes (I had the cruise set and was passing them, both sped up). So I bumped up to 80 and just passed them and slowed back down. I was going about my business when the Audi blew past me. I thought, "Game on" and caught back up we looked at each other nodded and hit the gas. I didn't get to see his face as, very quickly i was several car lengths ahead. After a few moments of this I stopped accelerating and let him catch up, he was in the same lane behind me. I think we were doing slightly north of 100. I waved and hit the gas again and the car pulled hard and kept pulling hard until I let off the gas.
A mile or so down the road I had slowed back down to what I was doing before all this started. He was getting off the highway next to me, looked over, smiled and gave a thumbs up.