Heather, wearing a super-cute hat, is talking to Mom. She's going out to the movies with friends, and is that okay? Because tonight is a special night. What a considerate daughter. Lisa/Mom say's she looks forward to spending some time alone and gives her some mad money. Cool!
In the car, Dr. M. and A.G. are staring out their windows as the piano plays. A.G. says, "I just want you to know..." and then doesn't finish his sentence. Dr. M. stares at A.G. and wishes him a happy anniversary. This scene is so tender it makes me wish they would start kissing. But they don't.
The piano continues to the next scene, in a candle-filled bathroom. Lisa/Mom is in an uber-bubble bath, drinking wine. Hey, that's how accidents happen, you know! She whispers "Happy anniversary, Mike." Aww.
Then, just like in the teaser, we cut to characters we don't know. It's a couple making love, then she stops, the she leaves, then the man spontaneously combusts. She screams. We care not. The end. Or is it..?