At 1310 hrs the Solomons Volunteers were alerted to Northbound Route 4 just north of the Navy Rec Center for a reported MVA with one overturned. Crews arrived moments after dispatch to find a two car collision with one vehicle on its roof and bystanders pulling out the trapped victim. Units packaged and evaluated three patients resulting in one being flown to a trauma facility and the other two transported to local hospitals for further evaluation. All units cleared 40 minutes later.