A BMW hit a man after arguing with the driver at a McDonald's shortly before.
Police are appealing for witnesses after the pedestrian was struck by the car, which then left the scene.
The man suffered minor injuries following the incident in Shoreham, West Sussex on Sunday evening.
Sussex Police said: "Police received a report of a collision near the Saltings Roundabout on the A259 near Shoreham Airport shortly after 6pm, where a pedestrian was reported to have been struck by a dark grey BMW 3 Series which then left the scene.
"He suffered minor injuries.
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"The driver and pedestrian are understood to have been involved in a verbal altercation at McDonald’s in Eastern Road shortly before.
"Police would like to speak to anybody who witnessed the incident or the events leading up to it.
"Please call 101 or visit the Sussex Police website, quoting serial 349 of 05/12."