I bet one could take a pinhole camera and have it with a memory stick or a wireless connection to the persons cellphone.
I have seen bigger rail attachment pieces of equipment that still went into a modified holster.
Now I am thinking about integrating a camera with a varmint scope that uses a collimator green laser illumination tube.
Cabelas sells these, I have been thinking about getting one, interestingly enough with off the shelf game cameras and an infrared illumator a person could create a poor mans nightvision riflescope.
Again if one was so inclined they could take any camera equipped cellphone, remove the camera, attach an extension lead, have the cellphone body back in a foreend housing....
Sorry, just perusing some ideas and being a hobbyist gunsmith and a tinkerer this is giving me some ideas.
But back to the image of a bear chasing me up the tree I seriously doubt I would be taking any camera pics, those kind of people usually wind up being little bear turds with bells in them.Or camera pieces.
Wow a camera dedicated to making snuff films.