Hamlet

Revealing mistake: In the beginning, when Hamlet's father is being buried, the new king takes his sword and places it down onto the grave. When he does this, the tip hits first and you can see the blade bend.

Hamlet: Frailty, thy name is woman.

Hamlet: The play's the thing, wherein I'll catch the conscience of the king.

Hamlet: O villain, villain, smiling, damned villain.