Been pulled by the Fuzz! Oooer!!
Me and a mate used to work nights, replacing kit on desks which meant traveling out to other buildings in the area with a big trolley full of Compaq PCs ( the huge chunky metal 486s ) monitors, keyboards, back around 1994.
One night we have about 7 or 8 machines with monitors on a trolley, it's 2am and we're larking about dragging this trolley down a dark London street. We notice a car with 4 blokes in it. We start bricking it, stop larking about and just starting pushing the trolley more quickly. We pass the car and hear the doors open, we start legging it with the trolley 'cos we think we're going to get robbed and beaten up, thy blokes suddenly run after us and shout "Police! Stop!". Turns out it's a bunch of undercover Fuzz watching for people breaking into offices and nicking PCs! We get 2 mins of the third degree and escorted back to our HQ where we have to rely on a rather dozy and dopey security guard to confirm we are we say we are, praying the coppers don't smell the security guards preferred flavour of "Jamaican Woodbine" and bang goes any credibility we have!