He's saying that that's some crazy ass driving even just in a straight line and if you get stopped your ass is going to jail no matter what the circumstances and that's not a take-a-class kind of ticket. That's the kind of ticket that at the very least costs $1k or more and probably gets a license suspended, and in turn greatly affects your home and professional life. It's not worth it for the cheap thrill to just willy-nilly decide to go 150 on your average highway/interstate w/o LOTS of planning INCLUDING but not limited to a spotter and a few different, "Lose 'em," routes in case the worst happens.