Trisha Brown's Man Walking Down the Side of a Building

I still remember going to see this, back in 2006 at Tate Modern. We went up to the balcony on level 2 and saw the man slowly come to our level, facing the ground. It was terrific!

Of course it isn't dance per se, but it is choreography - designed movement. Here is a video of that day from the Tate Channel.