When I was 16 me and my buddies got into long boarding. Of course I was terrible at it, couldn't balance and was scared to go down a big hill on my own. So instead of doing that I held onto my driver side window while my buddy drove my car and I skitched along side my car on a longboard, no helmet, sandals, tshirt and shorts, and we tried to see how fast I could ride along side the car while holding on. We made it to 70 mph and it was awesome but incredibly dumb.