scratch

If you've never seen the comedy classic, "Monty Python and the Holy Grail," there is a scene where Arthur, King of the Britons, encounters a black knight guarding a bridge.

Arthur quickly figures out the stalwart knight will not let him pass, so the two do battle, with the king severely injuring his enemy in the process.

He cuts off all his arms and legs.

Yet the black knight persists, insisting his injuries are, "but a scratch."

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Turns out this happens to people in real life, not so much with swords and knights, but with can openers and ice skates.