That crunch, that gasp for air, that's precisely what Hickey wants. He wants to take this man down, to break him into pieces, to show Crozier just how useless he is. He doesn't need him (he desperately needs him). He's survived perfectly fine without Crozier, he's thrived without Crozier. He'll take this failure of a man, break him to bits, and then he'll get the respect he deserves—

—and oh fuck he just got stabbed stabbed.

As the knife plunges into Hickey's thigh, he lets out a sharp yelp of pain before proceeding to get the hell away from Crozier by any means necessary. Running away, kicking at his feet, it doesn't matter, what matters is he needs to get away and not get stabbed again.