Loos.

The toilet has broken, so now the only way it will flush is if you pull of this copper wire we've fashioned onto the inside of the cistern. Its really interesting though... I didn't realise it was so clever until now, I just thought it was the toilet really. But I have now begun to look at plumbing with the same gaping mouthed, morbid curiousity that you do when you see an open chest cavity on a medical drama.

British Humanist Association bus posters

A man talking about Richard Dawkins and the like.