Monday, around noon, our South San Francisco neighbors were alarmed to see someone opening their car door which was parked in front of their home. While they normally keep all their vehicles locked, this afternoon it was left open while they were in their house. One of the residents quickly went outside to see what was happening only to find an elderly man inside the doorway of the vehicle. When the elderly man saw the homeowner, he closed the door and continued walking down the street as though nothing had happened. Another resident of the home saw the elderly man walk down the street, again trying the doors of vehicles he passed, until he realized he was being watched and left the area.