Two teenagers were injured in a car accident last Wednesday afternoon after their vehicle careened across a sharp curve on San Geronimo Valley Drive, flipped over and caught fire. Dylan Grimmer and Sage Crawford, both juniors at Archie Williams High School, were on their way to surf at Fort Cronkite when their car lost control just outside town. First responders arrived on the scene around 4:30 p.m., according to a spokeswoman from the Marin County…