We used to do that when I was a kid...only we usually used a concrete block. We would jump over our tonka trucks...just like Evil Knevil. I had this one buddy, Jimmy, my best friend back then. He had a big hill in his back yard. I rode my big wheel down that hill, jumped over like 6 or 8 trucks, then crashed right through their screen porch. I don't think his parents were too impressed...lol!!!
