Hitting your own weapon is always fun. When running a game, always make sure you have a table of cool results that can happen on critical combat failures that produce various forms of weapon damage.

About the only thing better is the table for hitting yourself.

Transcript

Anakin: I need more power. Obi-Wan, your sword!
Obi-Wan: You're not ready for two swords. It's not safe!
Anakin: I don't care. He must die.
Obi-Wan: Remember your training! Don't get drawn into the Dark Side.
Anakin: I Force Pull Obi-Wan's sword and charge Dookû before he zaps me again.
[SFX]: whoooosh
Count Dookû: You are not in control of your passions, young Padawan.
Anakin: Don't condescend to me, you damn dirty Sith.
[SFX]: Whooom!
[SFX]: Whooom!
Count Dookû: 'Ow dare you blacken mah name!
Count Dookû: Ze Sith are zhust legends. Told to children like yourself to scare zem at night.
[SFX]: Whooom!
Anakin: Who are you working with?!
Obi-Wan: Careful with those swords, Anakin. You'll cut someth—
Anakin: Whoops.
GM: Critical failure. Roll on the self-hit table.
[SFX]: krtzssshh! {Anakin cuts his own laser sword in half}
[SFX]: clang clang {the halves of the sword fall to the ground}
Obi-Wan: Never mind. Problem solved.