Did you see that mammoth the picked up with one of those choppers couple years ago (some damn Discovery Channel thing)? That was cool. Almost didn't make it though, the rotors were coning like you wouldn't believe. But they managed to pick up and fly away a woolly mammoth encrusted in ice which turned out to be a lot heavier than they thought (past spec for the chopper actually).
Then there's those mining trucks with the 30 foot tall wheels and the ladders (not steps LADDERS) to get into the cab, I think those trucks weigh more than any individual. Anybody wants to know just how much STUFF we can haul around these days should start here:
http://tlc.discovery.com/schedule/series.jsp?series=4016
Seeing these things in action is awe inspiring.