Malcolm: [to himself] Rage in the Cage. Rage in the Cage.
Reese: What are you doing?
Malcolm: Wait till Mom sees what you did to my expensive microscope.
Reese: You don't have the guts.
Malcolm: Say you quit, Reese.
Reese: No! You're going to totally be grounded when Mom sees the beating you gave me. [screams then punches self]
Malcolm: What are you doing?
Reese: [with bloody mouth] Sucker!
Malcolm: Oh, yeah? Oh, yeah?
[As Malcolm smashes his own microscope, Reese starts hitting himself again]