Must See SHTF / EOTWAWKI / Survival Movies

My top 10:

#1. Idiocracy - MUST SEE!!!

#2. Road Warrior (ALL of them, even Beyond Thunder Dome)

#3. Jeremiah Jones

#4. I am Legend (better than Omega Man imo)

#5. The Book of Eli

#6. Zombieland

#7. The Postman

#8. Shawn of the Dead

#8. Water World

#9. The Day After Tommarow

#10. The Hunger Games

The list goes on (The original Red Dawn, 28 Days Later), but had to stop somewhere.

Any others?