Ha ha, sounds to me like you've been conditioned.
Seriously, when you're "friends" make you behave like Pavlov's Dogs, it's time to re-evaluate your friendship.
Poetic justice seems like a good course of action, if you're into the whole vengeance thing.
Learn hypnosis (or seek out and hire an 'evil hypnotist') and hypnotise them to punch themselves in the face every time they see a red car, or to run up and down every set of steps & stairs they see.
Seriously, when you're "friends" make you behave like Pavlov's Dogs, it's time to re-evaluate your friendship.
Poetic justice seems like a good course of action, if you're into the whole vengeance thing.
Learn hypnosis (or seek out and hire an 'evil hypnotist') and hypnotise them to punch themselves in the face every time they see a red car, or to run up and down every set of steps & stairs they see.