First responders came upon an unusual sight Sunday morning: a car submerged in a backyard swimming pool. Stanislaus Consolidated Fire Protection District firefighters and sheriff’s deputies were dispatched about 2 a.m. to Olive Grove Court in Riverbank. The driver apparently hit the house and plowed through a fence before driving into the pool. Battalion Chief Rick Bussell said no one was in the car and deputies had detained one person. The other person or people in the car had run away. No other information was available.