Fairfax County police said yesterday they had an unusually busy weekend, with a dozen major incidents that included robberies, stabbings, abductions and a runaway car that smacked into an apartment house in Reston.

"Compared to the usual Fairfax County weekend, it was unusual both because of the number of crimes and the variety," said Sgt. Philip Lively. "Everybody noticed it," he said, adding that it was "really more typical of an urban area than of suburban Fairfax County."

Police provided these details about the more serious incidents:

* During an argument at Winchester's Restaurant, 6151 Richmond Hwy., early Saturday, William H. Schwolow, 20, of 735 Shelby Dr., Oxon Hill, was stabbed in the hand. Richard A. Bell, 27, of 174 Williams St., Alexandria, was arrested and charged with malicious wounding.

* A 27-year-old woman was abducted early Saturday as she was walking on a trail near Fairfax City, knocked to the ground, sexually assaulted and robbed of cash. Mark P. Landstreet, 26, of 5902 Bridgetown Ct., Burke, was arrested and charged with sexual assault, robbery and burglary.

* A man armed with a gun demanded cash from the desk clerk of the Quality Inn, 6111 Arlington Blvd., Seven Corners, and fled with an undisclosed amount in a tan van driven by another man.

Police were called Sunday afternoon to AAA Mobile Homes, 8229 Richmond Hwy., to investigate a report that four men were loading property from a mobile home into a truck. An hour-long search using police dogs and a helicopter ensued.

Then, police went to the 3400 block of Breckman Road after receiving complaints that a man was going house to house, offering money to residents if they would hide him. Police arrested Jamie Turner, 24, of 7401 Richmond Hwy., and charged him with burglary in connection with the mobile home incident. Three other suspects were being sought.

Saturday morning just before noon, a man was working on his 1968 Cadillac in Reston when it began moving, dragging the man 30 feet before he was dislodged as the car struck a tree, and continued on into an apartment building at 11919 Winterthur La. The apartment's occupants, whom police did not identify, were stunned but uninjured. Damage to the building was estimated at $8,000 and to the car at $4,000.

Police charged the car's owner, Edwin Scribner, 53, of 11917 Winterthur La., with reckless driving.