See Yourself In The Third Person Without Drugs Or Major Bodily Trauma
The rig you see here is wireless although you can actually just wired the camera through a frame that you put in front or behind you. You can use almost any head-mounted display including (try the Vuzix) and a camera with video-out. Then you put a bag over your head and walk around.
Just remember, folks, when you look into the void the void looks into you. Have fun!