When he manages to push Crozier off of him, Hickey immediately goes for his knife again. He takes a step back, pointing it directly at Crozier, before hissing,

"Now, Crozier. If I were you, I wouldn't do something I'd regret."

Truly, he doesn't want to stab the man. Hickey's in a new place here. He can make something more of himself. Maybe now, Crozier can finally see his true potential. That being said, he will not hesitate to slice a bitch if Crozier comes for his throat again. Let's see how the former captain handles things with no working hands.