From PaperPlanefr
Apparently, BMW has experimented with a new way to subliminally plant a message (in this case, their logo) into viewer’s mind without their being consciously aware of it. In the video above, which is a BMW ad, the BMW logo is nowhere displayed on screen. Yet, by flashing a powerful photo flash through a cutout of the logo, the image of the logo is imprinted onto your retina for a couple of seconds. This image becomes visible when you briefly close your eyes.
Are we going to be subjected to this form of subliminal ad in the future, where every flash on screen is a suspected ad for a product or service?
source wired