A night security guard working alone in an office building was startled when he began hearing soft footsteps on the top floor around 3 a.m.
Lights stayed off in motion areas, and no one answered his calls—making the empty building feel increasingly unsettling as he followed the sound through dark hallways.
Expecting an intruder, he carefully searched the floor… only to discover the truth:
The “footsteps” were actually a new robot vacuum quietly moving through the office.
On top of that, a cleaning staff member wearing noise-cancelling headphones never heard him calling out.
What started as a frightening overnight mystery turned into a harmless—and slightly embarrassing—case of modern workplace technology.
