A man has been arrested on suspicion of drink driving after he drove into the back of a parked car in Ruislip on Saturday.
The man, 53-years-old, flipped his car on its side during the smash at around 9.40pm.
Police, London Fire Brigade and London Ambulance Service were called to the accident in Dulverton Road.
According to an eye witness, it took over an hour to get the man out of his vehicle and into an ambulance where he was taken to a West London hospital.
Police later arrested him for suspected drink driving. He has been bailed to attend a west London police station in mid April.