A woman suffered serious injuries after being knocked down the stairs at a city nightclub. Police have released CCTV images of a man suspected to have been involved in this incident. A 20-year-old woman was walking down the stairs of a club when a man shoved her from behing on Sunday January 19. The woman was knocked down a flight of stairs, sustained serious injuries and was taken to the Royal Adelaide Hospital by ambulance. Police want to speak to the man caught on camera, who left the club immediately after the incident. His exact involvement is unknown.