Non-American here actually not quite understanding the picture:
What is the looming grey thing above the house?
Tornado?
Suspecting an inside joke I miss...
[Edit]
Pieced it together myself based on the other comments:
Apparently Waffle House never closes except during near-world-ending events, like dangerous hurricans about to hit.
So seeing a closed one would actually be scary as hell.
That was a good one, really too American for me!