I'm looking for one of those surreal animated anti-smoking PSAs that ran on Canadian TV in the seventies. We got a CBC channel in my home town, and those things gave me a few nightmares.
But for now, here's a slightly more recent live-action one from the Great North:
And here's an article from Esquire on what the writer considers the Five Most Disturbing Public Service Announcements of All Time, featuring PSAs (including some from Canada and Britain) that are way too nasty for me to embed on this blog. (They really want people to see this stuff on TV?)