Ermmm… OK (with apologies to stooo for the thread hijack).
Ingredients
[list]
[*] 1 camera capable of high speed shooting[/*]
[*] 1 copy of Photoshop CS3 or above[/*]
[/list]
Recipe
[list]
[*] Pick a good vantage point through which the rider will do something interesting[/*]
[*] As the rider enters frame, start machine gunning with the high speed shutter release, don't move the camera[/*]
[*] Pick 3 or 4 of the best images in the sequence, make sure there is good separation between the rider position in each frame[/*]
[*] Load all the images into Photoshop, each image should be a separate layer[/*]
[*] Use Photoshop's align layers tool to compensate for small camera movements[/*]
[*] Add a mask to all the layers and manually mask around the rider revealing the underlying frames[/*]
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I shoot with a Canon 7D, so I can fire off shots at 8 frames per second. The two examples above were done with my 30D which will do about 5 fps.
-j