It makes perfect sense that Fargo would remain calm in a crisis while Zane goes completely to pieces. Zane may seem more self-assured, but he's usually the person assisting those in danger from the outside; he's not used to actually being the one who needs rescuing. Fargo, meanwhile, ends up in mortal danger due to his button-pressing habit every other week, so he's used to feeling like he's going to die. Hell, this time he gets to do it while fulfilling a lifelong dream, and with a spectacular view!
Zane's plight regarding his relationship with Jo. Fargo brings him up on being three weeks late with the Ion Damper he was supposed to make for the test rocket, and when Zane does deliver the thing, he didn't make it himself as he said but stole it from the BCE. This is pretty out of character for Zane, who while irresponsible is usually pretty dedicated to his job; when asked to do some illegal hacking in "Stoned," he uses the opportunity to angle for new equipment rather than a personal bribe. Later, it becomes obvious what the problem is; he is freaking out over the fact that his memory has apparently been tampered with, to the point that he doesn't remember getting engaged.
Worse, Jo notes at one point that Zane is "anti-anything that damages his brain," so having been apparently experimented on in this way taps straight into his worst fears.
He's in constant freakout mode and probably not sleeping; making high-tech gizmos is clearly out of the question. He needs answers to avoid getting fired from the job that's keeping him out of prison.
