See Demo:

Circus Clown Wheel Stunt

6 seconds of one circus clown riding a motorcycle and carrying a very large hamster-like wheel on his back while a stuntman does 360 vertical rotations in the large wheel on another bike...I guess your really just have to see it to understand.  Click the demo button to the right to see a low-res preview of the clip.

$9.99 one-time cost. Instant download. File is a high-res .mov file (Quicktime). Master clip is 640x480. 8 mb. Master clip will not have watermark.