What are some physical fights Gene has with other characters?

One of the more memorable physical alterations that Gene has with another student takes place in chapter 6. Following Finny's dismal from school because of his injury, Gene quits playing sports and decides to become the assistant manager of the rowing team. When Gene arrives at the Crew House for his first day, Quackenbush attempts to pick on Gene. Quackenbush is an egotistic, arrogant boy, who is disliked throughout the school. Because Quackenbush is a senior and has never liked Gene because of his popularity, Quackenbush calls Gene a "maimed son-of-a-bitch." Gene cannot control his anger any longer and ends up punching Quackenbush in the face. When Quackenbush grabs Gene's neck, he throws him off his back and the two boys fall into the river. Gene then walks out of the water as Quackenbush tells him never to return to the Crew House again.