Some say the world is supposed to be ending tomorrow, Jesus is coming and so on, so let's assume it really did for a minute, and you're an angel now, looking upon your past life on earth (or a demon, depending on some of the decisions you may have made ) ...
Would you have any regrets? Things that you never got to do, things that you did and wish you hadn't done, things you wish you could've said to someone that you never did, things you may have said to someone that you really wish you didn't?
Whether the world ends or not, this could be used as a bit of a wake up call to work on regrets.
p.s. Why does the world have to end on a Saturday? Why not on a Monday?