Though Tyson isn’t particularly fond of rock climbing, it’s something he does enjoy doing with his brother.
When they were growing up, it was one of the few activities unrelated to academic lessons that their father would set aside time for and allowed them to do together. Even with sports that they both took, they were in separate lessons or had separate tutors. Rock climbing was just for them.
It was one of the first things that Tyson and Jethro did together when they reunited after Jethro ran away from home, when Tyson returned from his time with The Colonel, and to celebration once Jethro recovered from his cancer.