a man skateboards fast down a hill, using metal discs on his wrist to slow down and stop, throwing sparks
A man moving extremely fast downhill on a skateboard https://www.instagram.com/diego_poncelet/
Michael, bald 38 year old white guy, wearing black - rolls toward the camera slowly on a skateboad, pops and scoops the board FORWARD with the back foot, so the board rotates on a flat plane 180 degrees in the air, and lands on it, sketchy, rolling slowly to a stop, like a goof ball.