Witnesses said the pool at Eagle Harbor apartments in Clay County was empty Saturday when the car crashed into the water, leaving only the top of the vehicle visible from above the water, WJXT-TV, Jacksonville, Fla., reported Monday.
Neighbors said the driver appeared relaxed but disoriented after escaping the car with his canine.
"He wasn't panicked, he was really, really calm," witness Neal Mars said. "I was pretty sure he had no idea what just happened."
Authorities said the man and the dog were treated at the scene for minor injuries. Investigators said they have yet to determine the cause of the incident.
Tow truck driver Mike Tewkesbury said it took three drivers four hours to free the car from the pool.