Monty weighs 160 lbs, and at the time had an over-designed metal piece for its neck. A sensor failed and it faceplanted, taking a 1 cm deep chunk out of the concrete. It's still there, under some carpet.

Sure doesn't look that heavy, maybe I'm misjudging the scale here, I'll have another look at that video.

Nice balancing by the way, smooth dampening.

Edit: Ah yes, now I see it, that's a small scope and a lab powersupply in the background, I estimated the size off by a lot.

I figured the whole thing was about a foot tall or so, sorry!