Illustration For JG Ballard's Billenium
"Often 'locks' would occur when a huge crowd at a street junction became immovably jammed. Sometimes these locks would last for days. Two years earlier ward had been caught in one outside the stadium, for over forty-eight hours was trapped in a gigantic pedestrian jam containing over 20,000 people, fed by other crowds leaving the stadium on one side and those approaching it on the other. An entire square mile of the local neighbourhood had been paralysed, and he vividly remembered the nightmare of swaying helplessly on his feet as the jam shifted and heaved, terrified of losing his balance and being trampled underfoot.."