As of 2024, this is the last time Baby Susie's inner voice has been heard. The first time was in The Hand That Rocks The Wheelchair. That being said, it also appears in a deleted scene from Life Of Brian.
Bobby Briggs is also the name of a character from Twin Peaks.
It is officially revealed that Joe became paralyzed as a result of being shot by Briggs and that he lied about being knocked off the roof by the Grinch.