i saw some other videos showing more massive events, but this one really stuck with me. possibly because of the place chosen -- an enclosed space where people move with one set purpose that gets interrupted by the mob. the others were all parks, train stations and such, which (for me at least) imply a larger degree of freedom of action/movement/purpose/whatever, allowing for a bigger feeling of "anything could happen" which you don't get from a place like a supermarket.