So now you are an expert on kitesurfing lol. The backloop references the kite the double back roll references the rider. The first loop jumps you as you roll into the backflip the second loop you are already in the air and it pulls you fast and hard as you continue rolling into the second backflip. No one lands it. It is nasty. I landed it. In fact I spent all day everyday trying that one trick again and again. Landed on my head several times. Broke a rib and some gear. The used to call me captain caveman because I would wipe out hard it is not an easy thing. But Yeah I landed it again and again took me a couple years to get it.