To market the movie, Chronicle — about 3 guys with superpowers — 3 drones were built to resemble humans and were flown over NY City. This obviously generated a lot of buzz (is this even legal?) and it made for a super interesting promotional trailer.
Simply amazing… and viewed over 55 million times on youtube. But, for what it must have cost to produce this, I wonder how they were certain that all the bystanders would sign releases for the video/commercial?