Which TV adverts (past or present) make you want to jump through the nearest window?
For me, at the moment, it's the Vauxhall Zafira ads with those whiny little northern brats (no insult intended to northerners in general, of course!).
I hate this advert in ways that I cannot even begin to describe politely.
"Over-tired" - aaarrrrgh! Notice that the brats in question seem to have been locked out of their own house by their parents. Who could possibly blame them? Hopefully they'll be allowed back into the garden once the crocodile pit has been installed.
Perhaps the advertising "genius" who extracted this rubbish from the deepest recesses of his or her nightmares was tormented as a child by being forced to listen to Jimmy Clitheroe shows on the radio and is now wreaking a horrible vengeance.

Or perhaps I should just go and get a beer and calm down.........
Talking of which, why are beer adverts usually entertaining, even when the beer being advertised is vile muck such as John Smiths, Fosters or Budweiser (Yank version, not the nice Czech original)? Come to think of it, generally speaking it's only the brewers of really nasty beers who can afford to advertise their products, which results in lots of pubs stocking a big range of completely undrinkable filth. Caffrey's, anyone?

OK, I've gone off on a tangent so I think I'll stop now.
Sorry!