What Have I Done?

This.

After somebody commits an action, they're not guaranteed to be proud of what they've done. They might look at the aftermath of their acts and feel a deep guilt after doing so. This could have been murdering many people, pranking somebody, destroying a city or town, or arguing with them and saying something that makes them run away in tears. If an antagonist plays this UnTrash, it's often because they just had a Change Of Heart after seeing what they've done to other people.