That's a lesson, kiddies.

Especially when the monologuing villain is being played by a typical GM.

Transcript

Obi-Wan: I wait until the others leave and then jump down behind Grievous.
[SFX]: jump
[SFX]: paf
General Grievous: {back turned} Once upon a time there was a very annoying insect.
General Grievous: "Buzz buzz," went the annoying insect. "I wonder if there is someone I can annoy today?"
General Grievous: {faces Obi-Wan} I loved my insect. I loved it so much.
[SFX]: kzrzk
General Grievous: But it died. In time all things die.
General Grievous: Some by having their wings pulled off.
General Grievous: The cat—
Magnaguard: Don't worry, my lord. We'll take care of this fleshy scum.
[SFX]: kzrzk
{Magnaguards advance on Obi-Wan, who draws his laser sword}
[SFX]: kzrzk
[SFX]: whooom!
[SFX]: kzrzk
Magnaguard: Now, you Jedi—
GM: A mass of metal suddenly drops from the ceiling.
[SFX]: whoooosh {Grievous drops a huge weight on the Magnaguards, crushing them}
[SFX]: kzzzt!
[SFX]: Kerrunch!!!!
General Grievous: Don't ever interrupt me when I'm monologuing!