They are the pictures the spin doctors and handlers spend their lives trying to avoid – a politician snapped next to a sign spelling out something unfortunate.
Brown avoided being photographed under a sign reading "You can't polish a ..." (this post fills it in) when he visited the Innocent Smoothie headquarters in west London.
Cameron, however, was not so lucky with the thought bubble apparently coming out of his head on this one.
The only blessing for the Tories is that they ditched the Are you thinking what we're thinking? slogan from last time around.
If you have seen other photos in this genre, please post them below and I'll round up the favourites later this week.
