Beer snob here with an old joke: Always date beer-drinking women. Any woman wiling to put something that tastes that bad in her mouth more than once is a keeper.

Maybe. Or it could have been the Engineer's last bottle of absinthe. There's no way to reasonably speculate, let alone know, the purpose of the green crystal, because it never comes up again. Given the film's blatant abuses of Chekhov's Gun (2 years of life support, you say? Perform any surgical procedure, you say?…

"Somewhere in heaven, something went badly wrong. And our creators decided to destroy their own creation."

Hell, they haven't finished writing the script for this movie yet.

Sure. And what happened? He couldn't save them. And that made him sad. So, he went back to being a bastard.