For those old enough, does anybody remember a strange thing that came on telly sometime in the eighties? (Not Danny LaRue)
It was during an adbreak and the screen suddenly went fuzzy and then a woman came on and said something like "This is a message from the future, we are transmitting from the year 2050". Then it started showing images of war and poverty, interspersed with futuristic graphics of the Earth and vast ruined cities etc. I think there was then a message that the world we inherit would be a terrible one if we didn't change our ways. Then the screen went fuzzy again and the normal ads returned.
I was watching it with my family at the time - it was early evening. I clearly recall my Dad turning to me and shrugging with a bemused look on his face.
I've never met anyone who recalls this. It was very weird!
(For the record, I don't actually believe it was a real message from the future)