"Oh no, I know how these things work. I'll probably end up killing my grandfather and stop existing or something."
"So, gang, I snuck into the time machine when Dr. Mad had her back turned. Then I went 35 years back in time, found Charlie's parents, and broke them up." "Who's Charlie?" "Oh, that's right. He no longer exists."
Invoked: Bob wants to commit suicide, and one of the things holding him back is the amount of grief he'll cause his family and friends if he does it. He goes back in time to before his conception and breaks his parents up, thereby erasing himself without causing his loved ones any grief.
Bob manages to arrange events such that if he ever is the victim of a Ret Gone everyone would be doomed.
Diane's dream is to murder Bob's grandfather, so Bob takes her with him when he travels to the past.
Bob doesn't kill his grandfather.
Bob takes precautions when traveling in time so he won't be able to kill anyone, even by accident.
Aware of the potential consequences of altering the past, Bob only uses his time machine to visit the future.
Discussed: "Sometimes I wish I could time-travel. Then I could go back to before Charlie was conceived, and break his parents up so he wouldn't exist."
Conversed: "Hey, do you remember who Bob was going back in time to kill again?" "Yeah, Chris." "Wasn't that his grandfather's name?" "Come to think of it, yeah, he actually is Bob's- ...wait a second..."
Bob talks nonstop about how he killed Charlie. Because Charlie no longer exists, no one knows what Bob is talking about.
Bob forcibly separates Charlie's parents by sending them to different time periods.
Played For Drama:
Bob's grandfather was a big jerk that severely hurt and traumatized a lot of people, including Bob. Now Bob has the opportunity to erase all this and make many people's lives better, by killing him in the past, but is he right in doing so? And what will happen to Bob if he does?