I was in a crush once. Glastonbury, at an intersection, not a stage. Much smaller than this and nothing like as bad. Scary though, quickly. I and some others stood up on bins (trash cans) to coordinate, and managed to diffuse the crush. The thing that amazed me was how fast the crowd changed. Some were in panic, for good reason with the crush. Just a few meters back and folk were just pushing to get through with no idea what was happening in front of them. I know I’m preaching to the wrong crowd, but WATCH and LISTEN and look out for one another. When something bad happens in a big crowd, somebody will notice and try to do something about it.
What a horrible, stupid way to go. My heart goes out to the families, friends and other attendees. How sad.