Was i using the same camera as you? cool! I just put it in apeture priority, lowest apeture and ISO 400, i just work with it playing with apetures depending on what depth of view i want ect.
Adam, i filmed the backflips

and i film one of your laps, just for fun. I'll put the back flips on youtube now.
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Canon 40D (350D backup) - EF-S 18-55 - EF-S 17-85 - EF 100-300 - EF 50 - Canon 430 EX || Speedlite - Canon BG-E2N Grip
Adobe Photoshop CS4 Extended
AX-10 Crawler - Thats all I have left!!!