You know, the only equivalent crowds I can think of in another country right now are for Dianna's death:
And even there they aren't rolling on the ground. So...yeah, I'd assume it was at least somewhat acted. Whether they were ordered to behave this way, or just did it because they worried someone was watching, I'm not sure.
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Cats land on their feet. Toast lands peanut butter side down. A cat with toast strapped to its back will hover above the ground in a state of quantum indecision