They sit there together, watching the movie and the dog is absolutely loving it. He's crying at the sad parts. Laughing at the funny bits.
After the movie, they're leaving the theatre and a movie-goer comes up to them and says "Hey man, I just saw you and your dog in there, watching the film. It was amazing," he said, pointing to the dog "He looked like he was absolutely loving it! He was crying at the sad parts, laughing at the funny bits..."
The man replies "Yeah I know, it's crazy...
Spoiler:
