Predator 2, towards the end when Harrigan gets the disc and uses it to slice of Preddy's arm. The Predator goes hurtling down the side of the building, catches on a downspout, swings across the alleyway and through the hefty brick wall of the neighbouring apartment building.
I'm not referring to just AvP, sadly. I'm talking about all the yakking going on in the I, Robot thread, the multiple "me, too" posts in the Star Wars DVD thread, the majority of the dissenting voices in the MPC thread about the Alpha, the Robotech game thread, etcetera, etcetera, etcetera.
It just doesn't seem to end, really.