Can covering someone's nose and mouth actually work as a submission?
Rather than putting someone in a choke around their neck, could you just cover their nose and mouth to stop them from breathing? It is true that it takes longer for them to run out of breath that way and much longer for them to pass out, but would it actually work if you could keep holding on for that long, for argument's sake? And could it be an effective way to subdue someone in either a friendly bout or a serious street fight?