"We're running out of air and options."
— The Doctor, Doctor Who, "The Ghost Monument"
Avon: Slave! What is our life support capability?
Slave: One hundred and fifty-five hours, Master.
Soolin: By the time the oxygen runs out, we'll be bored as well as dead.
— Blake's 7, "Stardrive"
Without oxygen, your zubmarine is merely a metal tomb
Evelyn: Hypoxia. Things get sillier, and sillier. And then you die.
Elastigirl: [giggles] I don't wanna die...
Elastigirl: [giggles] I don't wanna die...