In South Korea Post-it helped a man propose by renting out three floors of a building and getting in 250 people to help put up a message made entirely of Post-it notes.
The stunt was pulled of on White Day, kind of like a South Korean valentines day where men give gifts to their valentine, but on March 14th (interestingly on Feb 14th men receive gifts from the women!).
The work was made by INNORED, South Korea.