The context of the following conversation is Jan thought it looked pretty dumb from the previews, but Jan actually enjoyed the movie.:
Jan says Well that was better than expected.
The friend responds See I told you it would be good.
Jan responds The trailer looked so dumb though.
The friend responds It's supposed to, its one of those dumb comedies.
Jan responds I just thought it was going to be actually stupid.
The friend responds Next time you can try to change my mind about a movie.