I love them, too! Wish I could be in one. Two I remember are one done by The Big Bang Theory cast and an old one in a food court before they became a “thing.”
It’s amazing how much joy you see on people’s faces in these. I don’t understand the people who act as if it’s not happening around them. They are so oblivious.
My sister got flashmobbed in Texas for a recycling video. They put an empty bottle on the ground next to a recycling bin to see how long it would take for someone to dispose of it. She was the first person to pick it up after several minutes, and the whole room applauded and cheered. Pretty funny, although I don’t want to post a link to the video without her consent