Birch, I think they're two different moves, as Shannon said, but that's still impressive.
Shannon, one of the guys at the gym who is really good at these, says to just jump a little higher than normal, and keep the jump there, learn to whip the rope faster. I've tried that and had no success yet, but that might be good later on, for developing more DUs in a row. For now, what I've been doing is what some of the other guys from my gym showed me, which is to do 2 or 3 single jumps, then for the DU, I kind of "ball up" on that jump, and whip the rope. The idea is to do single-single-double-single-single-double, etc. So far, after the DU, I usually hit the ground so hard and without grace that I can't keep jumping, lol, but I'm working on smoothing it out. I have long hair and wear a ponytail, so one problem I have with straight vertical jumping is that the rope tends to hit my ponytail. Tucking it under a sweatshirt helps, but then mostly I whack myself in the toe if I miss, and those stinking cables hurt! You definitely want a speed jumprope or a wire/cable style rope of some sort that will really whip around. A lightweight cotton/poly rope just can't spin fast enough. At home, I just have a length of electrical cord, like you'd have on an extension cord...it was a scrap, I just cut it to length and hold the ends so they don't spin at all...the wires inside are flexible enough that it spins around without getting all twisted out of shape, and it's heavy enough that it will spin fast. Not as good as a real speed rope, but it works.
So, I have about 1 pound to go till I'm under 160! I've been POP with the food the last few days and the scale has been very cooperative. I keep waiting for it to say, "psych!" and bounce back up, which I'm sure it will, but it would be very nice if it showed me a 159.8 first!
Today we had a focus day on balance stuff and gymnastics...being monkeys on the rings, which was fun, and some superman style planks, v-sits, stuff like that. I meant to try Mel's move with the KBs, since it might be easier (they have handles that are higher off the ground, compared to my DBs), but ran out of time today. Still need to do my 60 situps for today.