Midnight Lunch Truck
“Lunch truck is here” used to be the only thing heard on the Page All at where I worked in the mid-80s. I worked alone on a weird sort of evening/night/overnight shift for several months. Once, in a fit of sleep-deprived hysteria at around midnight, I got on the PA and said “Lunch truck is here” with kind of a sinister laugh. I heard two distinct set of footsteps run down the dark hallway and out of the building with the sounds of “ohshitohshitohshit”.
I later heard two programmers were on deadline when they became convinced that a maniac was in the building.