The crash came near a standby-station for the Kusoldharm Phuket Foundation so paramedics gave chase and watched as the man swerved his car from side to side to try to dislodge the injured woman - one of three hurt when the car struck the motorcycle about 3am.
''The vehicle stopped several hundred metres on down the road,'' said Lieutenant Wittaya Sinjamlern of Thung Thong Police Station. ''We believe the driver was drunk when he struck the motorcycle and just decided to keep on going in the hope he could escape.''
The three women were taken to Vachira Phuket Hospital in Phuket City.
The 27-year-old man was proceeding down Vichitsongkran Road in central Phuket when he struck the pink motorcycle at the intersection with Phraphuket Keaw Road and Baan Kathu-Baan Samkong Road.
Witnesses said two of the women were left on the ground at the scene while the third was on the car's bonnet, where the windscreen had been shattered on impact.
''The driver would not have been able to see clearly but he kept going anyway,'' the lieutenant said.
The car, with Kusoldharm paramedics in pursuit, stopped outside Kathu Post Office.
Witnesses said it appeared to be a callous act.
The man - as yet unnamed - has been charged with reckless driving, speeding and drunk driving, Lieutenant Wittaya said.