The stains appeared black-red under the cold LED light and my first thought went along the lines of “Somebody dragged a corpse out of the kitchen!”:
The dumpsters sit off the sidewalk behind me on the left, so, most likely, they just have a bit of trouble maneuvering overstuffed trash cans and grease tanks around the door. At least, that’s what we hoped.
Notice how the door hinges the wrong way? Perhaps the architect never anticipated moving waste from the kitchen to the dumpsters.
The food was OK (we did not order the Chef’s Special Long Pig), but their overly loud “background music” reverberated far too long inside a cavernous room with hard walls. We gave it 2/10: would not eat there again.
This has absolutely nothing to do with stabbing guides.
The Smell of Molten Projects in the Morning 
This caption card from a Monty Python sketch unaccountably comes to mind:
ONE SLICE OF STRAWBERRY TART WITHOUT SO MUCH RAT IN IT LATER