Has any actually seen a flash mob? unexpectedly?

[HoraceCope]

I have only ever seen these shared on facebook

I did. The kids loved it. Not sure what is was for though.

No. And it would annoy me intensely if I did. Humph.

No but I saw footage online of one that happened in our local supermarket.

Yes, a good few years ago now - was in a local museum. I liked it, was sweet and nowhere near as smug as I would have thought.

I took part in one . It was excruciating, and passersby didn't seem pleasantly surprised.

Yep - in Scotland

Pipe band just formed up out different corners of the shopping centre - was fab