Rack the balls in a standard rack, but put the cue ball in the second position in the last row. Then freeze the bottom row to the side rail, lining up the center ball with the second diamond. The extra ball that's not in the rack hangs in the far corner pocket. To make this shot easier, you can practice it along the short rail or move the racked balls closer to the hanging ball.

I use pretty much a 90 degree vertical masse, hitting the cue ball at 3 o'clock (taking 6 o'clock as the point where it's frozen to the rail). I hit the cue ball as far out as I can without having my cue run in to the last object ball in the row. You should hear and feel it if it does. Also, if it's running away from the rail too much, try hitting at 3:30 instead.