a corked spin feels exactly like a normal spin, except its way easier to land on your feet. Because you know your gonna be off axis, your not scared about it, where as if you are just spinning normally you shit your pants if you become off axis. Anyways, just spin like normal, but tilt your head way back while you are looking around. You'll go super off axis, and it will feel weird your first time, but after like 3 trys it becomes habit to just land it. Its so easy. It took my like 4 months to learn, and then one day I just did it and I haven't fallen since. Good idea is to get a camcorder and film yourself jumping on the tramp. You'll see exactly what you are doing and you can pinpoint mistakes like not tucking up enough. Hope this helps