Here ya go Tony.
This impala came into a waterhole over which I was sitting. He was 34 yards out and turned back to watch some blesbok coming into drink. Notice the black spot on his neck (I wish everything was marked with a bull's eye). When he turned and tightened up his skin, I felt I could make the shot. He dropped in his tracks and died moments later.
http://s277.photobucket.com/albums/kk73/iamyourhuckleberry/?action=view&current=impalawackyslo.flv
I'll be back over there in about a month.