I am sure that this single 15/20 minute performance explains why their Greatest Hits is the best selling album ever.
I remember the day well, I was working in a children's home and two of our younger children had gone missing, they were playing dare, according to one of them, on the Mile End Road! It didn't end well so one of them with me by his bedside spent plenty of time at the local hospital watching the concert. He made a full recovery.