Well it totally depends on what you are trying to caputre, what kind of equipment you have, and what kind of angles you want.
Is it a camcorder or camera? Digital or film? Can you operate it via remote control?
One thing to remember is that the vibration will limit your ability to get a smooth shot, especially if you mount it on some kind of structure such as the window post. Shutter speed can overcome this (if we are talking still cameras), but if you point it in the direction of the prop there's a good chance you'll get an ugly blur in the frame (or stop it all together).
For camcorders with no tripod, probably the best thing is to have a buddy come along and flim it.
Run a search at www.photo.net
or at www.photosig.com
; they seem to know their stuff, and will probably have some good ideas.