BMW uses afterimage to brand their logo in viewers minds

"What do we see when we look straight at the sun and then close our eyes? That's right, a bright moving disk that lasts several seconds. Every child knows this afterimage effect. We use the afterimage effect for a completely new brand experience, for the first advertising commercial that doesn't use a directly visible logo, but by doing so generates a more intensive connection to the target group. We developed a cinema ad for BMW motorcycles that turns spectators into astonished fans. It does this by using an afterimage of the brand to literally get inside people's heads. "

via Metafilter