Rolling in the tire thing. When we were kids I took five or so 18 wheeler tires, tied them together, put in a little padding, and we would take turns rolling down the massive hill between my godparents house and ours. At the bottom of the hill were an *** of pine trees and it was not uncommon for your head, or feet, to come out off the tires midway. Looking back it blows my mind no one died. The shit we used to do!