At least they could get into the mystery cupboard
Reminds me of the time I went to a warehouse to re-patch a few network points; The factory had just been renovated, which included lining the old asbestos-and-corrugated-mouse-poo walls with uPVC panelling.
When I got to the door to the cupboard that housed our comms equipment, it wasn't there, I searched for a bit in case I was looking in the wrong place, checked my site map etc, but instead of a door, there was just an expanse of shiny white plastic.
I must have looked quite a sight, stood in front of a perfectly empty expanse of wall laughing my tits off at the absurdity of the situation.