Fringe Event?

[CalebToNowhere]

Mystery illness affects 12 girls at same school exhibiting Tourette like symptoms of tics and verbal outbursts | Mail Online

What's going on here? This actually freaked my wife out a bit.

 

[Doug]

No big deal. They all had PMS at the same time.

No, seriously.
I would suspect something like a vaccination or tampon dispenser they all had in common.

In the old days, we'd just call it demon possession and burn somebody.