Anger collar
Invented by Unknown
Purpose of invention To shock someone who is angry
First appearance "Bender's Game"

The Anger collar was a collar made for Leela as she had anger problems. It shocked her whenever she had thoughts of anger, violence, profanity and thoughts of a sexual nature. Leela didn't mind the shocks in the end as they were mentally linked to thoughts of violence, and she associated this with the pleasure of beating people up. It also shocked her when she lied.