you are probobly throwing the same kind of rotation that you do for your 5s, which puts you a little corked in your backseat comming around for the 3 rotation, I do it too sometimes, so to do it right either dont throw your spin down, but throw it more horizontal across your body so that you spin more upright, if you want to do it corked then you are going to have to carve off the lip and rotate around your tips.... understand?