After pretty thoroughly reading and rereading the post, I noticed only one thing preventing it from being possible. By suspending his upper body and giving Kanitah the freedom to roll, Fury's legs have no real resistance to Kanitah's persisting leg vice. Lifting himself info the air would have the negative effect of slamming Fury into the ground as Kanitah rolls with him.

Though Fury tried to disentangle his legs you did state that it would not work if the leg lock continued. And with the inside control that he currently has, Kanitah wouldn't release or even relinquish any of his grip.