Have you ever heard of a corked backflip, sometimes called an eggroll? It's double corked backflip with a 180 at the end. At least that's what jon does. Some people do it more like flat 3 to flat 5
its officially a double flat spin, but the lines are so blurred you cant really tell, plus sometime people do them like off axis backflips(tanner), and others more lincolnish (turpin)