SAW IV
The fourth installment of the SAW series. The first was the best, or at least tied with SAW II. SAW III was so-so and didn't quite measure-up, but it served its purpose. Now, SAW IV, on the other hand, was very confusing because it was set in the same time as SAW III. This can be helpful to tie up some loose strings in the plot, but many people didn't understand it so they dislike it.
"Did you see SAW IV last night? Oh, it was dreadful! I hated it!" -person who hasn't seen all SAW movies or maybe one/two and didn't understand the fourth
"What are you talking about? It was awesome!" -person who has seen all SAW movies and understood the fourth
"What are you talking about? It was awesome!" -person who has seen all SAW movies and understood the fourth