Sort:  

Shake shake shake, you roll the 20-sided die.

You rolled a 20.

Shake shake shake, you roll the 6-sided die.

You rolled a 4.

ok with the double damage .. i am thinking they are both dead.
if so

Action 2: move south.... run !!!!

Wow! You made it out. Good job!

OK, technically, the scattergun doesn't scatter until 1 space away, but if we line the 2 zombies up, the double damage could blow a hole through the hulk and still kill the walker behind it, or vice versa.