This is a variation of the basic 3 ball cascade, with an added step. Do a normal cascade, and then throw one of the balls up high, and very quickly place the next ball under your armpit and hold it there while you juggle with the other two. Then you could drop and catch the ball, and give it another try.
Watch this video. It gives you a better idea of what the trick looks like. It's not DVD quality, but it's the best I have right now. Watch it in your browser, or download it to a disk. I don't care what you do with it.
