Son driving dangerously?

Don't let him take the kids out in his car. To be honest the most dangerous part would be not following the speed limits. I wouldn't drive like that, but I'm guessing he knows what he is doing. Oh and it wouldn't be skidding is my guess, it's DRIFTING and if you know what you are doing it isn't that dangerous, still dangerous because you still risk losing control. You are also talking about a car that may have been designed to run at those speeds, I'm going by company since you are listing the car, so running it at 140 isn't that dangerous in a straight line.