It happened on the B3081 near Verwood - he had to be cut free by firefighters.
Driver Arrested After Series Of Collisions
Police are investigating a number of alleged fail to stop road traffic collisions in Dorset and Hampshire.
Dorset Police say at approximately 5.50pm on Sunday 26th May it was reported that a light coloured Toyota truck had clipped another vehicle at the Crooked Beam roundabout on the A35 in Christchurch.
On the same day a further alleged incident occurred at around 6.40pm at the roundabout on Queens Park West Drive in Bournemouth when it was reported that a light coloured truck had struck a grey Vauxall Astra.
Nobody was injured in these incidents.
Police Constable Chris Vaughan, of Christchurch police, said:
"Unconfirmed reports suggest that there may have been further collisions during this afternoon or early evening - one of these possibly in Hordle in Hampshire.
"I urge any witnesses to these collisions to come forward and talk to police.
"I am also appealing for anyone who witnessed the manner of driving of a light coloured truck at these locations between 4pm and 7pm to contact Dorset Police."
A 42-year-old man from Lymington was arrested on suspicion of driving offences and released on bail pending further enquiries.
Witnesses and anyone with information should call Dorset Police in confidence on 101 quoting incident number 26:347. Alternatively, call the free and anonymous Crimestoppers line on 0800 555 111 where mobile phone tariffs may apply.
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