Playing With: Broken Pedestal

Basic Trope: A character comes to despise his/her mentor or idol for evil actions.
  • Straight: Bob once taught Chris noble martial arts, and Chris uses his ninja powers to catch Bob committing crimes.
  • Exaggerated: Bob, once a pacifist and a lover of kittens, has crossed the Moral Event Horizon and is barely recognized as Chris' original mentor, such is the atrocity of his crimes.
  • Downplayed: Chris discovers that his mentor, Bob, has sold out and started churning out useless self-help guides for a quick buck, causing Chris to feel somewhat contemptuous.
  • Justified: Bob was forced into a life of crime due to living in a Crapsack World.
  • Inverted:
    • Bob used to train villains to commit crimes, and now does good acts instead.
    • Alternately, Chris is the one who starts committing crimes using the training he got from Bob, to Bob's deep disgust when he finds out.
  • Subverted: Chris has misinterpreted Bob's actions; he is in fact a good person.
  • Double Subverted: Then Chris learns about all the downright nasty crimes Bob has committed.
  • Parodied: Chris becomes disillusioned with Bob for horrendous crimes against fashion.
  • Zig Zagged:
    • Bob appears to be committing crimes, but then it turns out he has good intentions behind them, according with his original teachings. Then Chris learns this is just a cover-up to commit horrendous acts — it then transpires someone told him this, and it is a blatant lie.
    • Chris catches Bob in a Face Heel Revolving Door.
  • Averted: Bob has always been the same noble teacher.
  • Enforced: The writers decide Bob needs some Character Development.
  • Lampshaded: "You were once the noblest man on Earth, Bob. Now, I can't hold you in the same light I used to. Look at what you've done!"
  • Invoked: Bob decides to go under an alias and commit crimes in another city. The city where Chris is now policing.
  • Exploited:
  • Defied: Bob is highly disillusioned by the Crapsack World, but decides keeping his principles is more important, especially with all the people he influenced over his life looking up to him.
  • Implied: Chris is glad to welcome Bob into his hometown one day. A few days later, however, Bob has been banned from Chris' hometown.
  • Discussed: "That Bob has started beating up pensioners, raping kittens, and littering — how long before Chris finds him, and loses all faith in him?"
  • Conversed: "Chris is going to be so pissed when he finds Bob doing all this stuff."
  • Deconstructed:
    • Chris spirals into depression over the intense hypocrisy of Bob's good teachings and his current evil actions.
    • Alternatively, Chris finally realizes that Bob was always a simple asshole instead of the Knight in Sour Armor he always thought he was; it's just that he (and Bob) have never let himself admit it.
  • Reconstructed:
    • Chris takes strength from his original teachings, and they allow him to call out his ex-mentor for his descent into villainy.
    • Alternatively, Chris realizes that what Bob does doesn't really matter as long as Chris is still a good person.

A true Troper would use the link back to Broken Pedestal. You taught me that. So...why?