That's the one, and I agree with Jamie; sitting there watching Adam (basically) drowning was very unsettling.
Yeah, my dad was expressing some doubts about the effects the support chains were having on the rate of sinkage. One thing I really like about the show is that they're willing to go back and try it again if there's enough evidence that they screwed up. Somehow I don't think this one is going to be up for retesting though. ~_^