I deliberately wanted to use lighting to create an atmosphere of mystery replicating a child's room at twilight. The cars are first edition hotwheels from the mid-sixties, so they have unorthadox profiles, which apparently threw people off. Are they cars or spaceships? The idea of the title is derived from the mysterious appearence toys take on, in the mind of an imaginative child, when the lights go off, hence "while you were sleeping." Was that really so hard? Maybe I should have titled it "Toy cars in the dark" for drfmelanogaster and hedonist et al's benefit.