Bryon finally appreciates the fact that getting even is an infinite circle; therefore, the only way to stop it is to not seek out revenge. Mark’s reaction shows how unusual this impulse is, because the violence that plagues Tulsa is founded on this eye-for-an-eye mentality. Additionally, Mark sees it as a part of his brotherly duty to get back at the Shepards, because his and Bryon’s bond has been partially built on physically protecting each other.