Wyrd Sisters/Awesome

Magrat threatens a guard at knifepoint.
Magrat injects a little life into a thick wooden door, promptly blowing it off its hinges.
Death's candid admission towards the end.

Insane Duke: If I'm not a ghost, what are you still doing here?

Death: Waiting.

Surprisingly, the Duke manages to pull one while in the face of Granny Weatherwax. She had suspected that he was a weakling beneath a guise of strength, but was completely unprepared for him being so insane that it had refined what little sanity he had left into, "ice in the heart of a blazing furnace," sanity so cold and hardened that it came full circle and became a terrifying and powerful form of madness.