But this particular robot, for reasons as yet not known, appears to have driven down the steps of the fountain in the middle of the office and ended up floating sideways, rendering it immobile. It was removed, although is likely to have been permanently damaged.

Knightscope, the company behind the droid, said it was investigating the incident and that it was an isolated event.

But that didn't stop people drawing comparisons to Marvin, the paranoid robot from The Hitchhiker's Guide To The Galaxy series, and speculating that things might have just become too much for the K5.