The 619 is a move that is all about timing and momentum. The person who is going to be hit by this just needs to protect his face for this. The person actually doing though has to use his body's momentum to swing his feet as hard as he can otherwise it will not look like a 619. As you make a run for the ropes and jump, do not try to turn after you've jumped. You have to start turning your as you're jumping. It all depends on the momentum you have in your legs, as you get to the ropes keep your arms in tight to your body. Think of this as turning your body into a door to which your hands are the hinges of the door. If done right you should be able to do the 619.