I also love the Dutch advert that somebody posted a little while back in a different thread - you don't need to understand a word of Dutch to get it, so clever it was.
A man who drives a cement truck for a living pops home in it to surprise his wife with an unexpected visit in the middle of the day. He gets home and sees through the window that she is inside with another man, whom she is hugging - so, in anger, he fills the shiny new car parked on the drive - which he assumes must belong to the OM - with cement and wrecks it.
Then, he looks again and sees the camera crew filming the man handing over the keys to the shiny new car that she's just won, for their publicity - it had been an entirely innocent hug just because she was obviously over the moon to win the beautiful car that he was presenting her with... the car that her husband has now just completely trashed!