It isn’t even worth me talking about this.

“Turn young potential motorbiker into fans of BMW Motorrad created the first cinema commercial that doesn’t use a directly visible logo. During an exciting Superbike commercial we illuminated the BMW logo with a harmless photo flash onto the audience`s eyes. When the audience was asked to close their eyes at the end of the ad, they were surprised to see the BMW logo as an afterimage. BMW literally got inside people’s heads – involving them instead of boring them.”

Putting the phenomenon of closed-eye visualizations to profitable use, the Dutch ad team for BMW flashed the car maker’s logo in a darkened movie theater and then asked the audience to close their eyes to discover a bright BMW-shaped spot — also known as retinal noise — on the back of their eyelids. Note that “CEV noise will not disappear if observed continuously over a period of time”.
– via Denver Egotist