What does "actual physical control" of a vehicle mean in Florida?

The standard jury instruction frames it around two things: physical presence in or about the vehicle, and the present capability to operate it.

In practice the fight is over capability. The State points to the driver's seat, an accessible key, and an operable vehicle. The defense examines whether the vehicle would actually run, where the key really was, whether the person could have driven it, and what they were doing there.

Some fact patterns recur on the Treasure Coast: someone who pulled into a lot to sleep it off, someone waiting in a running car for the air conditioning on a July night, someone whose vehicle broke down, and someone in a passenger seat who gets described in the report as behind the wheel.

Because this is a jury question rather than a bright line, how the story is told matters as much as what the facts are.