In the early '70s, as teenagers, we would borrow the neighborhood Big Wheels at night and ride then down a local steep hill with several curves in it. Because of our size, our legs had to ride on top of the the handlebars. We had access to, and wore, motorcycle helmets. We would drift through each curve like flat trackers, usually 3-4 of us. At the bottom of the hill was a turn with hay bales. We would spin the Big Wheels into the hay in order to stop. Big fun. Hard on the Big Wheels though.