0:02:55

Ava is the first one to mention Jack's work as the best their crew could make.

0:16:35

Jack actually had some time off, but because the SM-13 got brought up to the hangar ahead of schedule, he had to be called back in. I like that this is a glimpse we get at his personality, even though naturally anyone would be pissy if their day off was interrupted. I imagine everyone in the COI is probably overworked because there just aren't enough people in existence to work.

The way Ava talks about him here, implies there are other welders in the tow ship, he's just the best one, the one she can count on. Which, since we got behind the scenes stuff from deadlymelodic, it matches this crew manifest!

Jack's last name is either Palmer, Abbot or Miller, if you wanna go with this extra that wasn't in the movie.

0:20:53

The start of the scene in which we get to see Jack! Played by fellow youtuber Jacksepticeye.

He looks at Simon with deep, grieving anger in this picture, but I find it interesting that this is all he allows himself to feel before throwing up and getting carried away. Even literally right after being radiation-blasted, he still continues welding and turns to Ava to tell her that his job is done. Like everyone else in the COI, he prioritizes his job being done, his part in the fight for survival being counted.

I also find interesting how he says that it should hold. Either he's not too confident on himself after the blast, or he's humble, considering how everyone else praises his work.

0:23:32

David tells Jack's name to Simon and also informs him of his stupid radiation-poisoned baka life.

On that note, this is the information we get about the radiation dose Jack was blasted with.

The manual specifies that a dose of 6,000msv is lethal in a few weeks, and the camera itself releases 7,400msv. 6,000msv is among the doses that irradiated people in Chernobyl, and some of those people died in around a month, so you could maybe push Jack's time to live a bit more if you want to - considering a balance between futuristic technology but a lack of resources for that technology. As a personal headcanon I'm giving him some arbitrary 25 days left.

0:24:02

Now it's David's turn to talk about what an amazing welder Jack is. Or. Was.

0:25:23

David seems a bit hurt here, like he's implying Ava cares more about Jack than him as members of the crew. I have this personal headcanon that Jack is Ava's best friend, and I like this line because it adds fuel to it. I also genuinely believe David is friends with both of them. It probably doesn't make sense to have this headcanon considering his scene, or else David would've been more hurt at Ava and especially Jack being at death's door. But I don't know, grief does weird stuff to you, and maybe it just didn't sink in for him yet. Idk I'm just rambling.

1:38:16

Last scene that mentions Jack, towards the end of the movie. This is when Ava gets into the SM-14 to try and rescue Simon and the blackbox info. She specifically tells David to pull a sick and irradiated Jack out of his bed to weld her in. May I remind you, her wording earlier already implied there are other healthy welders in the tow ship. The fact she specifically chose Jack, even if David has to hold him up, definitely says something. Either about him and his work, or about her.

Do you ever think about this scene, that we didn't get to see? How Jack, or David must've felt? David, holding up a sick, dying friend so he can trap another friend who might not make it out of that box. And Ava really didn't make it. How did Jack feel, getting to say a last goodbye to his friend, but at what cost? And the fact he does it, he agrees to it. It shows his COI side once again - his job is bigger than he is.

The fact Jack, the most irradiated person in that hangar, outlived Ava.