Re: 7X12 Nightmare in Silver(Grading/Discussion)(SPOILERS)
I've been thinking about the hyper-speed Cyberman moment and had a thought: The Cyberman don't seem to apply more force than needed at any given moment. That is to say, overkill isn't their thing. That particular Cyberman might have noticed he was badly outnumbered, and while he still probably had the advantage, now might be a good time to use that. Later on once the tomb had been woken up I imagine they figured that fast or slow they were going to mow down the human resistance.
"Circular logic will only make you dizzy, Doctor!" -- Peri