Car slides are one of the coolest actions that a person can take that involves a motor vehicle. People do them to get away from somebody chasing them, or to make for an awesome stunt in a movie, or in this case, to kick off an epic slip and slide.
I hope they pay him enough to buy some new man thongs after that prank. I can admit, I might have gotten a little freaked out, but I wouldn't have been squeeling like a little girl the first time she gets her period. Not that I know what that sounds like.