Splinter and April in “Unfinished Business”

April, it seems you have a rare gift - a sensitivity I have trained my entire life to develop. I would like to train you to be a kunoichi, a female ninja.

Wow. That's quite an honor. If I do this, does that mean I can kick everybody's butt?

We do not believe in using our abilities that way.

Oh, sure. But I could, right?

Yes. But it will the most difficult challenge you have ever faced. It will drain you physically, mentally and spiritually.

Can't be worse than high school.