During their formative years, the Tunnel Snakes harassed other students in Vault 101, even being bold enough to taunt the Overseer's daughter Amata Almodovar. Butch DeLoria presumes to be the leader of the Tunnel Snakes but Wally Mack might disagree if challenged.
Growing Up Fast: Wally attends your 10th birthday party and takes part in discussions leading to the formation of the Tunnel Snakes. Mack makes fun of The Lone Wanderer's Pipboy since Wally never wears his. Also, he makes fun of the Lone Wanderer's birthday party, saying that the party is for the little kid and that on his birthday, everyone played Hunt the Mutant in the Atrium. He then notes that Lone Wanderer wasn't invited to his party.