The match was a draw. That is noted. Rangers and Celtic, 1-1. In the 89th minute, Celtic scored. Then, in the final moments, Rangers equalized. A surge of departing fans turned back, meeting the continuing crowd coming down. The pressure funneled into Stairway 13, an exit known for its steep, enclosed design.
The investigation reports speak of chain reactions. One person trips. The momentum of the bodies behind cannot be arrested. The pressure builds, not from panic initially, but from simple physics. The reports give numbers: 66 dead. Most from compressive asphyxia. Their feet never left the ground.
It was not the first incident on that stairway. There had been crushes in 1961, 1967, 1969. Fatalities each time, but fewer. Lessons were suggested, then filed. The structure remained. The culture of dense, rushing crowds remained.
The event led to the Guide to Safety at Sports Grounds, the genesis of modern stadium design. Barriers were to be radial, not lateral. Egress must be calculated, not assumed. Crowds were to be seen as a fluid, with predictable dynamics. The language of the reports is careful, measured. It diagnoses a systemic failure in perception. The tragedy was not an act of god, but a failure of geometry and foresight. The excitement of a last-minute goal met a fixed, narrow channel. The outcome was, in the cold terms of physics, inevitable.