Quote Originally Posted by nickbaer View Post
Use a camera in a mode that doesn't click - mechanically or digitally.

A SLR is great for artistic portraiture, but won't add all that much to an action scene.

You can also turn off the electronic beep on digital cameras.

it is not possible to turn off the shutter noise on slr cameras.
The click is a real hardware noise and not a simulated digital one that can be turned off at will.