I’ve always loved these kinds of street arts, they’re fun to watch people do, in a kind of “can you guess what it is yet?” Rolf Harris way, they aren’t permanent, and the sky is the limits. They’ve been used before for adverts before and I’ve seen some good examples, but this is my favourite one I’ve seen for a while, maybe it’s because I’ve just come back from seeing the film? I don’t know. Anyway, it’s awesome, and was created in Madrid to mark the Europe Premiere, no name of the artist yet though [EDIT: I's by Julian Beever. See his other work in my post HERE].
Image from Geekologie
I may do a post with a collection of advertising chalk drawings soon