It was perfect, Kanitah was about to roll over. Both of his legs had come free and Fury's weight was off of him. 

Wait.

Fury's weight should be pulling towards the ground, but it's gone.

With a sudden and horrifying realization, Kanitah halted his roll like an early Warner Brothers cartoon character running towards a cliff, staring over his right shoulder at Fury. It was piteously evident what he was trying to do, and he wasn't going to have any part in it. Without Fury's weight on top of him there wasn't anything stopping him from doing this. Kanitah's legs kicked at an awkward angle towards the ground. Sending his weighty little body skidding across the ground away from the Fireen, escaping the attempt at Fury's grapple. 

If Fury attempted to interrupt the slide, Kanitah was ready. As he shoved off, he raised both of  his arms in front of him and bent them towards his face. In a boxer's guard, but parallel to the ground. If Fury tried to reinstate his choke hold, he would find an even more difficult to close gap between them. 

Lastly, by shoving himself across the ground horizontally, it put both of his legs together and straight. Which would prevent Fury from catching  them with his legs, disallowing him from spreading them out like a starfish across the ground.