The story the way I heard it

Houston (Heath and Nikki's child) comes running down a hill. He slips and bops his noggin. Nat runs to the trunk of the Carola where she keeps a 75 lb first, second and third aid kit. She grabs the kit and makes it back to Houston with an instant cold pack. Then she realizes she doesn't have her keys. They are now, in the trunk, where the 75 lb first, second and third aid kit used to be.

Heath, being Heath, came to the rescue and managed to open the door with skills learned as a piece officer, or perhaps despite them. Heck of a guy that Heath.

Hope Houston is OK.