Movie theater etiquette people!

So I went to the movie with a friend the other night. The movie was pretty good. Not too sappy until right at the end. Overall, not a total waste of money. However, after the previews had already started an older couple came in and sat down next to us. Now it wasn't the typical "I want to sit close to the middle but I'd rather sacrifice perfect seating than sit right next to a perfect stranger." No, no they sat right next to me. Slightly awkward, but I could get over it. Then they proceeded to talk through the ENTIRE movie. It started out fairly normal comments on the movie. Then it just kept getting worse and worse. Eventually we started making fun of their comments. They still didn't get it. They would shockingly state something that had been obvious for at least 10 minutes. Then they would talk about how sad the moment was. AHHHH!! It was horrible. We finally had to stand up in the middle of the movie, glare at them, and change seats. Annoying, but we got a good story out of it.