Stabbing is only a little good - good because Crozier also happened to have a knife - but bad for a thousand other reasons, including Hickey's proficiency with said weapon, but there's no way for him to articulate that to Raju right now. Not after being asked to actually move himself over an obstacle.

There's only half a second between when the question's asked and actual movement, Crozier gripping Raju's shoulder and leaning on him heavily to get himself onto his feet. He can't spend too long thinking about any one thing or he'll shut down completely. It's almost like having to trick his body into functioning.