one of my current hyper fixations is watching The Martian when I go to bed. (For context, I don’t really watch it, it’s more or less white noise for me.) But there’s a part that bothers me. When Mark blows himself up creating water he says he forgot to factor in the excess OXYGEN he was exhaling in the formula. For a movie that talks a lot about science… humans exhale carbon dioxide. Not to be confused w/ carbon monoxide which is a gas that can kill you.