The crash happened early Monday along State Route 163 near 6th Avenue.
A man rolled a car down a 50-foot embankment and ended up trapped in the backseat early Monday near Hillcrest.
The car was traveling northbound along State Route 163 around 1:15 a.m. when it went out of control near the onramp to 6th Avenue.
Firefighters and California Highway Patrol officer found the driver trapped in the back seat.
It took crews about 10 minutes to free him.
They fitted him with a neck brace and strapped him to a gurney before taking him to a nearby hospital for treatment.