It happened on the B3081 near Verwood - he had to be cut free by firefighters.
Teen Arrested Over Sex Attack
Police investigating a serious sexual assault in New Milton have arrested a teenager.
A woman met a youth near the train station between 10pm and 11.30pm on Tuesday before walking to Ballard Lakes where she was attacked.
A 15-year-old from New Milton has been questioned by officers and released on bail until April 29 while investigations continue.
Police say they are not looking for anyone else.
Anyone who saw what happened is asked to contact DC Paul Longhurst at Southampton CID on 101.
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.
48 Zany Zebras sculptures were sold off to raise money for Marwell Zoo.
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