I remember the first time Tesco at Camberley opened all night on Christmas eve. Must have been late 80's / early 90's. Police had to be called to evacuate the place. Got caught up in the melee while staggering off to the kebab van by Blackwater station after drinking beer in plastic glasses at the Agincourt, most likely.

<shudder>
Apparently, everyone piled their trolleys high then realised there were only a couple of checkouts open (most people have better things to do at 2AM on Christmas eve, after all, you'd have thought, not least stagger off to bed after a skinful?). The place was rammed full and people were just abandoning trolleys and going home when they saw the queues. Shelves rapidly emptied into trolleys, so people started to help themselves to stuff from abandoned trolleys. OK until they try to swipe something from a trolley that's not abandoned, whereby fisticuffs ensued.

Looking back, the ridiculous display of "me first!" attitudes was a real taste of things to come.