Is it an orb or just a reflection of light?

by Megan
(New Jersey)

My two friends and I were making a video in her basement. In one scene, two large orbs are seen making sort of a boomerang shape. One is larger than the other but their both pretty big. They both look like flying balls of light. We were using an IPod 5 and flash but nothing else. Her dog refused to come down the stairs and kept glancing nervously at the spot where it happened. Her house was built only 10-8 years ago.