Flipping him off was a mistake, but it is one that I have made on a number of occasions, and of which I'm not particularly proud. As to driving, I'm no moonshiner, but I have almost 10 years of closed course roadracing experience in my past, and I'm a very good driver. I'm pretty confident that I could put distance between most people and myself if I had to. The problem is that there are often other vehicles on the road, and driving it like you stole it isn't always the most responsible option. I'm not familiar with the town of Tomball, never having been there (although I do own a Texas Pitcrafters smoker grill, manufactured in Tomball

), but if such a thing happened in my own town of Grapevine, I would head straight for the police station, park outside the front door, and prepare to return fire if the perp continued shooting. My hope would be that he would realize that you don't shoot at police stations if you have any brains left in your head.
That the perp in this particular case was found passed out drunk in his truck does not bode well for the notion that he was a clear thinker, and driving to the police station might not have deterred him. OTH, you would have had plenty of backup.