I was going to lunch with an employee of mine and we were in a two-wide turn lane behind a black 03-04 Mustang with the GT bumper, but no exhaust tips whatsoever. So we go around the corner and it only had the Mustang badge -- no GT badge on it. So as I start to go by he floors it and takes off impressively. Then we get to the next light in front side by side. I asked and yes it's a debadged GT. The light turns green and I go ... I didn't hear anything so I backed off and then saw him in my side view mirror flying by. I hit it again but by then I was already waaay behind. I got owned by a stock '03-'04 debadged Mustang GT with no exhaust tips.
So the lesson, boys and girls, is that if you're racing, NEVER let off until you're sure the race is over. I assumed since he didn't launch at the light that he wasn't racing. I was wrong.