Street Luging

Climb a big hill on an open-for-business highway, lie supine on an elongated skateboard and roll down. Gather speed and try not to die. That’s going to be difficult because you have no brakes, you’re an inch from a road surface itching to see what bone marrow looks like, and you present a visual profile to passing vehicles that’s only slightly larger than a puddle. Which is what you’ll be if you have anything close to a lapse in concentration or luck. Extreme.