It's late, after a night of heavy drinking. You walk slightly staggering, regretting having drunk so much. And unfortunately, to get home you have to cross a small, dark, disreputable alley. Only it's the fastest way home.
You enter the alley and you freeze. In front of you is a seriously wounded man sitting with his back against the wall. He raises his green eyes to you, the orange of the streetlight edged in red. He lifts his head and sees you. He tries to get up, but fails.
"Who are you?"
It costs him to talk.
"Take one more step and you won't see the light of day again!"