Are you a diver? Do you currently dive with a camera. How about a video camera in your diving mask? The folks from Liquid Image have put a HD camera in your diving mask. Keep your hands free to spear fish or explore let the camera on your mask film everything you see.
I was pretty amazed at how they have accomplished this and I think you will find there new mask one of the most innovative products I have seen for divers in a long time.
As a subnote my wife is absolutely crazy about these mask. Needless to say sometimes CES cost me a few dollars once I get home as I end up buying some of the cool stuff at the show.