Question regarding the stability of Cybermen

[dubious_gannet]

The roomie and I were watching her Tomb of the Cybermen DVD and I mentioned that I thought they looked really cool, in many ways more cybernetic and deliberate without as blatanly robotic as the 2006 versions look to be. Her rebuttal was that the new design was better because you couldn't trip the new Cybermen. Somehow this spawned an argument about the trippability of Cybermen in general, with me maintaining that they were too solidly planted and her insisting since they were always falling over it was the same thing.

Stupid? Yes. But has anyone actually managed to stick out a leg and trip a Cyberman?