I remember as a kid watching this scary movie, I don't even remember the plot at all. There is one thing that can identify it because I think it was a big feature of the film.

So basically there would be things popping in and out at the background but it would kind of take a second replay to actually catch it if you werent paying attention to the background, if that makes sense. I remember one of the scenes specifically where a pentagram appears on a reflection of a mirror one frame, and the next its gone. It was kind of like that "Ooo you saw that?!"

The movie featured a lot of these type of scenes/frames. I think one of the features of the DVD was a look back on all the scenes that had this type of scary feature. Hope thats enough. Thanks in advance.