So Many Times I Have Walked Past Billboards,

without giving them a second look,

but this one is so neat and unusual I am surprised no one thought of this before, the ad is for Sweden's Apotek Hjärtat's Apolosophy hair care products, the ad recognises when trains enter the station - and then shows a woman's hair blowing all around, as though windswept by the train, it was so neat the clip shows it twice!