Percussion in the car while we were filming Rob was extremely loud.
I think the briefest summary we could put together would be "drive if you can" — being in a big steel box is better than not — and drive erratic and fast — it's harder to hit a moving target than television makes it appear to be. We've all put a lot of rounds through various and sundry cars, and there's lots of doo-dads in car bodies that stop or deflect bullets.
In general, if I'm traveling in a car for more than a trip to the convenience store, I prefer (and recommend) a dedicated driving holster that readily gives you access to your carry gun without doing the Rob Pincus dance to get to a strong side IWB. For short trips, I tend to stick a pocket pistol in the center console so it is more readily accessible.
If you've gotta bail out of the car, BAIL TOWARD COVER! That is, make sure you sight a destination before you exit the car. Running down the middle of the street screaming like a little girl is not, repeat not, a plan. In exiting the car, the armed person protects the unarmed person during the exit...ideally, driver and passenger need to bail out the same side of the car, the one closest to cover. Armed person first to if necessary provide cover for the unarmed person. A good reason to have 2 guns (as I typically do on driving trips) is that you have a means to arm the passenger.
In the past I've recommend higher capacity guns for long driving trips, as a carjacking is one of the few civilian situations where multiple attackers are the norm. Typically, I carry a larger capacity 9mm loaded antipersonnel ammunition backed up by a magazine of heavy duty penetrators. Considering my baseline paranoia, my next driving trip will include as my second gun (the one not on my person) the Spike's Tactical 9mm AR pistol with 30-round magazines and a single point sling, an Aimpoint Micro mounted on the top rail and an Insight MX6 white light/laster on the right side rail. If I gotta fight, I'd prefer the firepower advantage, thank you!
As I said in what has become my most controversial podcast, I have indeed traveled with a carbine and I suspect I may well again. In a period of intense social dislocation, if I have to travel I want a long gun with me. The podcast came after an urban riot situation where the passenger and driver of a car "stumbled" into a riot — a MAJOR failure of situational awareness — and, as I remember, the driver got out to try and "calm things down." That's exactly what happened, as the driver ended up dead and there's nothing quite so calm as a dead person. The podcast was controversial because I said if you are trapped in a riot situation and you have seen lethal or potentially lethal violence directed at you or innocents, ALL the participants in the riot are equally guilty of participating in lethal attacks and your actions must take that into account...in other words, if you're in front of me, I will drive over you without regard to race, color, creed, age, religion or sexual orientation. Ditto if, heaven forbid, I have to shoot my way out of such a situation.
Michael B