After leaving Vault 101, look around the wastes in the east section towards Tenpenny Tower. When you encounter military robots, kill them to make the process easier (assuming you do not encounter a Robobrain or a Mister Gutsy). You will find a repair shop called "Smith Casey's Garage" and go inside. There will be Mole Rats and Radroaches. Kill them and go into the repair bay area. Look for an electrical switch and push it. You will find yourself going lower into the garage. Eventually you will come across a vault door (Vault 112). Go inside and a friendly Robobrain will say that you do not have the proper clothing and give you a Vault 112 jumpsuit. Walk through the Vault to find chairs that are occupied by people. Find an empty chair and you will find yourself as a child. One of the adults will tell you to talk to Betty (Dr. Braun), whom will tell you to hit another kid. Do so and go back to her. She will tell you that you did a good job. She will also tell you to go break up a family's marriage. Instead of doing this, go in the abandoned house and look inside to find some items that can be activated. Press them in the following order: radio, pitcher, garden gnome, pitcher, cinder block, garden gnome, and empty Nuka Cola bottle. A huge computer will appear. Activate the option with the Chinese soldiers, then step outside and you will see the Chinese killing every inhabitant in Tranquility Lane, except Betty. Talk to her and you will be free to go. Leave the simulation and you will meet your father again and will have skipped most of the storyline.