It is NOT something to do on US roads where there may be traffic!
Um...no. My friends & I were luging in the mid-to-late 70s on custom skateboards. It wasn't hard to find restricted roadways where there was no traffic. Doing it where there was traffic was just plain dumb; parked cars were hazard enough. We invented 'luging' and others named it, but I have no knowledge of any movie that comes close to stimulating it other than Airborne...never saw SLWM...
We were longboard skateboarding in the 70’s......