A gravelly hillside where my Dad is teaching myself and my brother the fine art of BMX. We discover that you can ride from that side over to this side, avoiding the piles of unpacked dirt and the little potholes here and there. Or you can ride from this side over to that side, pushing hard up the hill and making sure not to pop a tire. Dad suggests a little trip across the ravine which has some PVC pipe stretched over it. And I call it like it is: a ballbreaker.