>> the weathermen's favorite one is it's the aurora borealis.ora borealis is, of course, an array of fast-moving brilliant colored illuminations throughout the sky. not lights that stay in the atmosphere. there are chinese lanterns. you would see it flickering or moving with the wind. this didn't move with the wind. >> it's not a plane, it's not a helicopter. flares, no, we would have seen smoke. that's what makes me think, well, it's a ufo. it's unidentified. >> any way you look at it, it's a genuine phenomenon. >> from time to time, t.j. still scrolls through his footage looking for answers. >> figure out why tinley park, i have no idea. >> it wasn't until nine years later that t.j. says he stumbled across something he hadn't noticed before. >> t.j. was going through it frame by frame, and he zoomed in. and he got to this one frame, and you could see -- if you look really close, you can see a picture of what looks like an alien face. >> a trick of the mind's eye or proof that we do indeed have company? >> oh, no. no, no, no, no. don't go out o