Floodlight failure/bad light pre floodlights
Crowd pitch invasion
Crowd disorder
Player disorder
Spectator death
Referee death
Player death
Serious injury
Wall collapsed
Racism
Player misconduct at halftime
The other one is fire which happened at Nottingham Forest when the main stand burned down, with as far as I know no injury but sadly at Valley Parade where many died.
That Forest fire rings a bell Bobby from my Goal magazine as a youngster ( probably around 1970 ). Goal had run a division one, as it was then, preview of the coming Saturdays fixtures and one headline was ” Leeds ready to set fire to Forest “, the following week they reported on the Forest stand fire and quoted the irony of their previous week’s headline. Why I remembered that I haven’t a clue as I can’t remember what I had for tea yesterday 🤣