I was cruising South on I35, MMOB in the far right lane. In the distance I spot a Porsche in my rear view coming up fast, weaving through some moderately thick traffic. When he gets close to me, he slows down and paces me for a little bit. I wasn't really in the mood, plus rush-hour traffic was starting, so I didn't react. He pulls on ahead, but still hangs around me, allowing a gap to appear in front of him. I know what he's trying to do, so I said "what da hey". I dropped down to 4th and floored her. Just as I suspected, he punches it and walks the living sh*t outt'a me. All I could do is just smile! Latter we end up side-by-side, and I look over at the guy, some dark shades wearin.....young rich kid lookin mo-fo, prolly a celebrity's son. I give him a "What's Up" nod, and he grins and punches it again, the car sounding like some Jolly Green Giant's Hoover vacuum. It had to have had 'bout 25psi of boost or something, the way it took off. He made it look like I was driving a Sentra or a Suzuki Swift!