By tying some long-lasting flares to helium balloons and releasing them, two skeptics from New Jersey made fools out of local and national media, including the thoroughly awful "UFO Hunters" show on the increasingly ill-named History Channel.

http://www.skeptic.com/eskeptic/09-04-01.html#feature

I love this story! It has all the features told breathlessly in UFO reports: distant lights, flying in formation, appearing to hover, then suddenly taking off. All of this from flares tied to a balloon! My favorite part was testimony from a pilot (who claimed on camera the lights shot off to the side), because UFO experts love to trot out pilots, saying they spend so much time looking at the sky there’s no way they could be mistaken. (via Bad Astronomy)