A 22-Year-old Rockville man was killed early yesterday when his car went out of control and ran through two fences, puncturing his neck with a post, Montgomery County police reported.

Police said Charles Frederick Absolon, 22, of 11225 Huntover Drive was pronounced dead on the scene after his sports car went out of control while he was driving southeast in the 10700 block of River Road in Potomac.

According to police, Absolon's car crashed through two fences before coming to rest in the yeard of 10725 River Rd. He was found there at about 7 a.m. and pronounced dead by police. Neighbors later reported hearing a crash about 2:45 a.m.

Police said Absolon was returning home from a friend's house when the accident occurred. The body was taken to the state medical examiner's office in Baltimore for an autopsy, police said. The cause of the accident is under investigation.

Absolon's survivors include his parents, Dr. Karel Absolon, former chief of surgery at WashingtoN Hospital Center and presently professor of surgery at the University of Illinois, at Champaign-Urbana; his mother Mary, two brothers, John and Peter, and two sisters, Martha and Mary, all of the home in Rockville; and his grandparents, Dr. Lester and Molly Bendix of Annandale, Minn.

Absolon graduated from Charles W. Woodward High School in Bethesda in 1974 and was a 1978 honors graduate of Marietta College with a degree in geology.