I like the one with the little girl who gets the £ out of the trolley and skips along all happy, dad asks for the £ back and her little face drops. So sweet.
The FAST adverts really stick in my mind.
Road safety ads; Such and such knew her killer (with the family in the car) and the little girl who'd been run over and was slumped by a tree (if you'd been going at 20 I'd survive..)
I'm sure there was a fire service one also (around Christmas) that showed just how quickly the room went up in flames.
What are yours?