Hope he has an 'instant-stop' blade or some very tough gloves. At that rate he could make a mistake, but I expect it was just done at that speed for the video.
It does look very dangerous, agreed. But I think it's made worse by the camera angle. From his point of view, he is looking straight on, and you'll notice his hands always move the piece forwards, with his hands either side by a good distance.
look mum no thumb, comes to mind, hee hee. What fruit was the man stripping with his teeth I initially thought coconut but now not sure same as the last one I think. any ideas?