G4TV Ninja RPS Battle

So, we think we know RPS pretty well here at the Think Three blog. But we got wind of this ad for Ninja Warrior (which looks like another great Japanese crazy game show program) and none of us here can make heads or tails of the RPS storyline. Basically , Ninja Dudes play RPS, Ninja B loses and cuts off Ninja A's arm, then they both bow to each other. At least if the Ninja  Dude B had won (instead of lost) using those scissors it might make more sense.

Are we missing something obvious here? And another thing, why must all TV commercials (for example crappy Bud ad ) use the idea of 'winning when losing' when it comes to RPS?