Dogs have about three hundred million scent receptor sites in their nose, compared to humans who have only six million. Dogs have more genes for coding olfactory cells, more olfactory cells, and the receptors in the nose connect directly to olfactory area in the brian. This combination of more and differing types, and quicker connections, affords dogs an estimated million times more sensitivity to scent than humans have. Perhaps this is why dogs love to travel with their head out the window of a moving car where they can experience a rush of scent. In Rockstar, Tom is portrayed close-up as he travels in this way. The soundtrack is produced from recordings of Tom’s voice and the engine of the car he travelled in. The visual effects and soundscape form a semblance of his perceptual and emotional experience.