The only way I (myself personally) could see self-harm coming from the crusher would be if I spazzed out and fell on it, at which point the minor discomfort it would cause to me would be offset by the hell the rest of my body would be getting. 
That said, it has VERY sharp corners that could easily cause you some grief if you get careless with it, but this isn't a whittler's knife we're talking about here... nor is it a fantasy toy. So as with all purpose-built weapons, it requires respect.
chuckinohio - tip down, edge forward is actually comfortable and natural feeling to me. That crusher, when pointing upwards could do some significant secondary damage as well as once again, those corners are SHARP.
Come to think of it, a serious sharp rap with the spine or broad side of the blade (1/4" thick steel) would definitely get someone's attention quickly... hurts just to think about that one...
That said, it has VERY sharp corners that could easily cause you some grief if you get careless with it, but this isn't a whittler's knife we're talking about here... nor is it a fantasy toy. So as with all purpose-built weapons, it requires respect.
chuckinohio - tip down, edge forward is actually comfortable and natural feeling to me. That crusher, when pointing upwards could do some significant secondary damage as well as once again, those corners are SHARP.
Come to think of it, a serious sharp rap with the spine or broad side of the blade (1/4" thick steel) would definitely get someone's attention quickly... hurts just to think about that one...