The Black Knight
"'Tis but a scratch!"
King Arthur encounters a mysterious knight clad entirely in black armor who guards a small bridge over a stream. After politely asking to pass and being refused, Arthur engages in combat — systematically dismembering the knight limb by limb.
The brilliance lies in the Black Knight's absolute refusal to acknowledge defeat. Each severed limb is dismissed with escalating denial: "Tis but a scratch," "I've had worse," "It's just a flesh wound." Even reduced to a torso on the ground, he threatens to bite Arthur's legs off and calls after him, declaring the fight a draw.
John Cleese's performance is legendary — the mounting absurdity of his defiance against all observable reality makes this arguably the most iconic scene in comedy film history.