A close up shot of Tirek's reaction when he was defeated back in Season 4. You can tell he was surprised, shocked, and upset by the fact that he has came SO close to conquering Equestria and was suddenly defeated and banished back to Tartarus in an INSTANT because he never knew the Tree of Harmony existed and that the Mane Six has gathered rainbow power to defeat him. I can tell how angry and upset he would be. LOL