Vintage Motorcycle Stunts

When someone mentions motorcycle stunts, the first thing that comes to my mind is Evel Knievel in his red white and blue suit, jumping over a line of cars.  He may be the most famous motorcycle stuntman, but as long as there have been motorcycles, people have been experimenting with different forms of stunts.  I imagine the first stunt riders started off riding with no hands and then progressed to standing on the seat while the motorcycle was in motion.  This naturally progressed to more motorcycles and stuntman coming together into circus-like acrobatic teams and other various forms of drill teams.  When it really started to get interesting was when jumping over obstacles became popular.  As I've searched through pictures of early stunt riders, I've been amazed by the number of photos showing a rider jumping over a line of people on the ground.  You might be OK if your somewhere in the middle, but that guy on the end must have taken a rear tire to the stomach at least once or twice.  Then there is the Wall of Death.  Just the normal act has enough danger to draw a crowd, but one group ups the ante by adding a live lion as a passenger during the show...