How many cars do you usually leap over at one time, when you do that? British long-jumper and Olympic hopeful J.J. Jegede can clear at least three, as he demonstrates in this video shot near the Tower Bridge in London. (A nifty time-lapse picture of Jegede's 6m jump lives here.) Jegede's personal best is 8.04 meters — still not enough to qualify for the Olympics, but there's still time.
If you'd like to compete in next year's Olympic long-jumping contest, you'll have to be able to jump over at least four cars. They can be Mini Coopers or something else — it really doesn't matter. If you can't afford your own practice cars, just go to the nearest mall parking lot and train there. Nobody will mind if you tell them you're doing it for America.