Christians (and perhaps other religions) use prayer for the silliest of things. They know they will die yet pray that they don't. I say this is silly because most Christians (at least the one's I know or have read about) tend to want to be with the loved ones they lost, be with Jesus, be with Biblegod, and can't wait to go to heaven.
Also, many of them can't wait for the rapture.
Yet, on their death bed; they want nothing more to live.