A tis his will moment is one where a character usually a villain goes back on his/her masters words or dreams and dislikes when the protagonist of the week apposes their masters teachings. This usually happens when said villain is raised by the master and taught with belts and knives. When they make remarks based of this trope only bad things such as villainous badassery, occur and in games lead to a nerfed boss becoming a psycho-hamster powered death machine weirdo, also known as turning red. These remarks are usually on the lines of, "you could never understand his words," "shut up you insolent whelp."
Hello, Unknown Troper. You'll need to get known to lend a hand here.