You are in a church with 5 other people.
It's been about 15 minutes since you arrived and you probably had about a 20 minute start ahead of the zombie horde which your group had stumbled across quite by accident earlier.
Now you need to finish getting set up to repel the coming attack.
Because you brought your sniper rifle you get to go into the tower and pick off as many as you can while the remaining survivors downstairs fend off the church as well.
When you get to the tower you look out and see an ocean of undead coming your way. Even with your perfect accuracy and remarkable speed you doubt that you will be able to hold the church down for longer than half an hour.
These are dawn of the dead remake zombies so they aren't slow.
What. Do. You. Do?