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You've got to be careful with these cars, they have a mind of their own http://www.thestar.co.uk/news/local/woman-pinned-against-wall-by-out-of-control-car-in-sheffield-1-6881676

A woman was seriously injured in a collision in Sheffield after a car mounted a pavement and pinned her against a wall.
The 33-year-old was walking along Chesterfield Road, Woodseats, when a grey Peugeot 207, travelling towards the city centre, mounted the kerb and struck the woman.
“Just before 6pm yesterday a grey Peugeot 207 was in collision with a 33-year-old woman who was walking along Chesterfield Road.
“The car, which was travelling towards the city centre, mounted the kerb and pinned the woman against a stone wall for a short time before it came to rest.

It'd be a lot safer if there was someone in there controlling them.