I was just driving back home and a gsx with a catback exhaust from what i could tell and was keeping up side by side with me going about 50-60mph. I could tell he wanted to show off his car and what not, so i slowed down to about 40mph in third gear and then hit the gas. I was a little ahead of him before i hit the gas, but not even a car length. I had a 1.5 car lengths or so on him and I hit the brakes as i was coming up to a bit over 100 mph.
This was the first time doing anything like this in my wrx and it was pretty scary and fun. The guy still wanted to go again, but I saw two cops and decided not to go for it again.