It happened on the B3081 near Verwood - he had to be cut free by firefighters.
No Sex Assault In Winchester
Police are now able to reassure the public after an investigation into an alleged sexual assault in Winchester.
Detectives are now confident that no sexual assault took place.
A 21-year-old woman had reported an assault as she walked home on February 29.
She told detectives she was hit on the side of the head as she walked home and woke up on the ground. She had thought she'd been sexually assaulted.
DC Ashley O’Dea who is investigating said: “Extensive enquiries have been carried out, and there is no evidence to suggest a sexual assault has taken place.
“We do, however, think it is possible the woman was assaulted and we continue to appeal for witnesses.”
Police are particularly keen to hear from anyone who was in the areas of Sparkford Road, Airlie Road, Cromwell Road and Stanmore Lane.
Anyone with information is asked to contact at North Walls Police Station on 101 or call Crimestoppers anonymously on 0800 555 1111.
Violent crime was up 37% in the last year. Police say it's mainly due to a change in how offences are recorded.
Anne-Marie Ellement took her own life after claiming she'd been raped by two colleagues.
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