Let me tell you what's a good/bad idea: trying to drift a car into another car. It's basically coordinated car crashing, and it's the best/worst new car competition I've seen.
Unsurprisingly, the "slide ride" comes from the mind of Formula Drift pro/hoon sensei Ryan Tuerck and his crew. The goal is to grind the bumper of the drifting car along the armco bumpers grafted onto a Crown Vic. It didn't go great the last time Tuerck tried it out, but this time it's a big win.
Then the director Andy Laputka hops on the top of the rolling sedan, basically to stand in the middle of an accident. If that's not a good/bad idea, I don't know what is.