[nosuchthing]

Here's a documentary/analysis on the circumstances that led to Germany's 2010 Love Parade disaster: https://www.youtube.com/watch?v=8y73-7lFBNE

Basically, exits were blocked off on both ends and the crowd was large enough that people trapped in the middle were crushed by enough force to led to suffocation. People attempting to move caused compression waves to ripple through the crowd which injured hundreds.

https://en.wikipedia.org/wiki/Love_Parade_disaster