A man is seriously injured after his motorcycle crashed into a curb in a freak accident at Parafield Gardens.
Motorcyclists driving along Martins Rd spotted the man on the ground at about 1.40pm on Saturday.
Advertiser he realizes he fell off the bike and hit his head in concrete.
After being treated at the scene, a 57-year-old man from Parafield Gardens was taken to Royal Adelaide Hospital for life-threatening injuries. He is in a critical condition.
Martins Rd was heavily crowded with lane restrictions as Major Crash officers inspected the scene.
Anyone who witnessed the incident or has Dashkam personnel is urged to call Crime Stoppers at 1800 333 000.