Your in a mine that has collapsed in a small surviving room with another person.
There’s a phone… it rings. You answer… It’s the people from above. They say it will take an hour for them to get to you but you only have enough oxygen for an hour for one person… You have a gun with one bullet…
What do you do…?
note: you must understand that this is black and white. i.e. if you say “I’ll wait it out and hope that the people are wrong” you “WILL” both die.