The crowd did do that spontaneously, though unless it was the first instance, it became an “in-thing” to do at some beer-fuelled hardcore shows.
By the way, wrestling isn’t gay. It’s not “staged”, because that suggests some attempt to deceive, and nowadays they don’t pretend that it’s real, you’re meant to enjoy it as entertainment. Some of it is utter shite, but try watching some mid-nineties AJPW and tell me it’s not entertaining. Japanese guys dropping each other on their heads is great viewing in my book.