"You'll believe a man can fly," an ad for "Superman: The Movie" in 1978. Early this year, people are once again astonished by the concept of flying. Last Friday, New Yorkers witnessed three people flying around the sky over Lower Manhattan. It was a breathtaking scene for spectators, which is believed to be a marketing strategy for an upcoming film - "Chronicle."

It was explained that those flying around the sky are actually radio-controlled aircraft. "Chronicle" is another superhero movie featuring three high school students who have superpowers and can fly. To market the film, the staff has contacted Thinkmodo - an expert firm when it comes to generating viral sensations.

Thinkmoto's co-founder James Percelay and his partner Michael Krivicka have thought of doing a live event and create the viral video. They got the approval three weeks ago. They hired builders of model airplanes in New York, Oregon and Pennsylvania to create three featured planes and two reserves.

Percelay said the planes are highly carbon fiber, battery-powered and radio-controlled. Each plane has more than 200 parts. He said each piece is extremely light and fragile. Their six-foot tall "flying people" structures weigh around 4 pounds. The building of the airplanes was completed in just 7 days, faster than the typical time it takes to make one.

Percelay did not identify the people piloting the planes. However, he explained in the video that they are skilled members of the Academy of Model Aeronautics. They practiced for two days before they performed the actual task.

The Los Angeles Times reported that planes flew over the Hudson River making six rounds with each lasting for only five minutes because of the limited power of the battery. One of the three flyers fell over the river and was immediately assisted by the NYC Harbor Patrol.