Ian wrote:The only thing I find ethically dubious is the sequence where he disarms the assailant and stabs him twice to the torso.
That was what caught my eye. I think if that was real (I know, I know, it's just a demo) and the guy died as a result of those stabs (quite possible when to the chest like that) then I'm pretty positive (after reading the MacYoung article, which seemed to me like the most sense I've ever read on the subject) that he'd get done for murder (worst case) or man slaughter, and spend a good few years in jail. It's worth considering. I'm not a lawer though, so don't take my legal advice.
There was also the bit where he stomped somebody's head while they were lying on the ground, unarmed, rather than running off - that looked pretty deadly.
I'm not saying his stuff isn't good - it looks very, very effective.