There used to be a large abandoned quarry in my neighborhood in Phoenix. Everybody called it "Little Grand" after the Grand Canyon.

When I was 19 I was playing Evel Knievel in the deepest part. There was a 30-40 ft downslope to the bottom of the bowl. In the middle of the bowl was a 3-4 ft hump that had been smoothed out by riders. I was on a Schwinn Varsity.

I was doing miserably compared to my friends. Only getting 3 or 4 ft of ht above the top of the hump. Getting mad I decided to "pump" on the downslope. My friends said I achieved great "air". Unfortunately I lost control and came down upside down. I had a scar where my shoulder impacted for years. Not hurt other than bruising though. LOL