Requires: Double Jump
This can be done in Level 7:7 in the Sci-Fi World. Jump into the first air cannon then, as you start to fall, use your double jump to reach the second air cannon. You want a score of at least 4500 points before landing on the next truck. At the top of the large ramp, jump off of your truck to start the air time counter and aim for the stream of trucks below. Land on as many trucks as you can before reaching the end of the level.