It would have been interesting to see how that piece of equipment got back out. The operator must have vast experience with equipment. Just watching made my guts hurt. I saw as he crossed the bridge - he was trailing straps of some sort. Perhaps to help get out if the equipment wasn't capable.
Two things I'd most like to know is what the control setup looks like for that thing, and what's on the price tag for a machine like that?
Not sure I'd want one for general use, but it is an interesting piece of equipment that looks to be highly specialized for specific applications. ..which usually means interesting control layouts and high cost of buying and maintaining. ..usually