That would be today, right now, in fact, if you happen to be in London and near the Northern Line, drop your trousers and hop on.
I certainly won’t.
Sorry I didn’t give you advance warning, I only just found out about it a few minutes ago. I certainly couldn’t let it go unmentioned here. Organizers say, “The ride is arranged so trou-less travellers board the train at different stops, creating the illusion of a bizarre coincidence for unaware civilians.”
Ah, those Brits. So quirky.