Billboard ads are getting more and more interactive these days. One of the most ingenious ideas is to run past a billboard at a certain speed to get a freebie; a pair of shoes. Watch the video below;
Read more here: http://www.adweek.com/adfreak/if-you-run-fast-enough-past-reebok-ad-it-unlocks-free-pair-sneakers-169929
This was done by Reebok earlier this month. It was definitely a great way to catch people's attention which immediately became a crowd caller.
What's YOUR ingenious idea?