Drivers need to be careful to avoid a concussion when getting in and out of these pint-sized cars. The Dwarf Car Museum, in Maricopa, Arizona, showcases the life's work of mechanic Ernie Adams.

72-year-old Ernie Adams is driving a very small car. Actually, the technical name is a "dwarf car," a road-legal nearly-perfect replica of a full-sized car, and Adams built it from scratch.