Thames Valley Police is appealing for information after an assault took place outside a Banbury pub on Saturday.
At 5.20pm, the 21-year-old victim was talking to three men in the car park outside The Musketeer pub in Ruscote Avenue, when a car drove into the car park.
A white man got out of the car, approached the victim and headbutted him. He then got back into the car and drove off.
The offender was in his late 20s and 5ft 11ins. He was wearing a grey furry jacket and jeans. The car was a Vauxhall Astra.
Anyone with information can contact PC Matthew Oaten from Banbury police station on 101.
If you don not want to speak directly to the police you can contact the independent charity Crimestoppers anonymously on 0800 555 111 or online at crimestoppers-uk.org. No personal details are taken, information is not traced or recorded and you will not go to court.