I had a friend at school who did this. At the cinema, after the movie was over, he would be one of the loudest voices in the group, talking about how awesome the movie was, how it's going to do so well at the box office and how he couldn't wait for the next one to come out.

The very next day, he'd come in armed with research on all the plot holes and ways the movie failed from other critics, and then just lay into the movie as if it was the worst movie he'd seen and how it was a waste of his money.

We would point out how annoying he was for convincing himself that he hated it. The only opinion that counted was the one right after the movie ended; that's the best and most honest review one could give. He kept on doing it. It wasn't cool, Chris.