I've just been finding out about an astonishing story in Russia. This is comes via our colleagues at bbcrussian.com. The police there faked a car accident, and got a child to lie on the side of the road covered in red paint. No-one stopped, no-one called the police.

Oleg in Sochi emailed: 'The fact that no one called to emergency services proves that police were right to stage the accident. It would be interesting to do the same experiment in other countries to see the difference.' I agree it would be. that may be difficult, but we can at least ask those of you who follow WHYS whether you would stop where you live?

I remember when I lived in Jo'burg in 1997/1998 and I had to swerve to avoid hitting a body lying in the road. It was 4am and near Hillbrow (the city's most dangerous area) and I kept on driving. It felt uncomfortable to do so, it also felt very foolish to stop.

