When a friend sneaks up behind you and pops a balloon in your ear, is that horror? Of course not. It will likely leave you irritated, and that's exactly what this movie does. There are no decent horror elements to this movie, just constant cheap jumpscares that rely primarily on audio. Imagine watching shrek and at random points the audio jumps to 200%. Startling but not scary, and it's the same with this movie. Do it enough, and is it surprising people would leave during the movie? It doesn't mean the movie is scary.
By the midpoint I stopped caring about the plot, the characters, and struggled through to avoid that restlessness that comes from leaving a movie unfinished.
Review of Insidious: Chapter 3
