Wales v New Zealand, 1924. It was a monumental day where the All Blacks got their first ever win over Wales at St Helens in Swansea.
Most remarkably, the game went on despite a balcony full of fans collapsing in plain view of 50,000 people.
Video footage of the collapse has surfaced on Twitter, through APSM Rugby Channel, and it makes for astonishing viewing. About seven seconds in you can see the alarming collapse as swathes of people fall as the game is going on.
