This is not a link to a video describing a specific bug in the product. It's just a link to a search of "onewheel injuries" in YouTube, which presents a variety of videos detailing all manner of injuries that come from operator error and the inherent dangers of OneWheel operation. Try searching for "mountain bike injuries" and see what you get.

Is there anything else? (I'm sincerely interested. The CPSC article clearly infers a situation in which it suddenly stops. Is this confirmed?)