"Yu Yu Hakusho: Ghost Files" Sanbiki no Yokai! Hiei, Kurama, Goki (TV Episode 1992) - Sean Teague as Koenma

Koenma : [as Yusuke's about to punch Mr. Iwamoto] Yusuke!

Yusuke Urameshi : Koenma?

Koenma : Have I got a big case for you! Three criminals have stolen the great artifacts of darkness from my father's vaults, made slush out of the guards and escaped to the living world.

Yusuke Urameshi : Can't you see I'm busy with this asshole here?
Koenma : It's your Spirit Gun.

Yusuke Urameshi : My what?

Koenma : A human being, as I've explained before, emits both body and spirit energy. While a ghost, you became more aware of your spirit energy and can channel it into you finger, hence "The Spirit Gun." It's far more powerful than a normal punch, but until you increase your spirit muscles, so to speak, you can only use it once a day.
Botan : [livid and storming in] You must be out of your mind!

Koenma : Oh... uh... Boton! You came!

Botan : Well, yes! Did you think I wouldn't when you send my best project to a pack of wolves? All three of these criminals are pushing out tremendous amounts of energy. They'll rip Yusuke into pieces.

Koenma : Yes, yes. I understand the odds are against him. And I would have preferred to have started on smaller cases until his abilities grew. But with this new case, I-I-I had no choice.

Sean Teague: Koenma