Isn’t it also to test how the surrounding infrastructure copes?Yes, before that though we had a test event. It was a lovely sunny day, we got to sit in our seats for 30 minutes and then on the signal we all had to get up and leave in an orderly fashion.
I suppose they were trying to simulate what happens at the final whistle of a game. What they failed to realize was that when the final whistle goes 40% of our fans have already left :-)