Big Reveal

It was me the whole time.

The reveal that's supposed to be dramatic, shocking, or, to the audience, heart-breaking. This often involves who the Culprit was in a Whodunit Mystery or series of murders around town, but it can also be on a smaller scale like that one lover in a blooming relationship can't continue to be with their partner because they were secretly in a relationship with someone else the entire time. Since Big Reveal is such a vague UnTrash, it depends on the context of the current or previous situation if it is or isn't called an Eye Roll UnTrash. For example, the disclosure of who the Hero's parents were wouldn't be considered eyeroll worthy, but revealing that somebody the Main Cast thought was a good guy was really a bad guy is often called clichéd by audiences.