Teenage Mutant Ninja Turtles, Season 1

[The Turtles show Master Splinter the symbol of the Foot Clan]:

Leonardo:
What does the symbol mean, Master Splinter?

Master Splinter:
Trouble.

Raphael:
You know something about these ninjas? Where do they come from? Who do they work for?

Michelangelo:
And what do they want with a magic sword?

Donatello:
Nope, not magic. Probably more like a self-perpetuating oscillation frequency generator.

Mikey:
Uh...in English, Einstein?

Don:
It packs a shockwave that will knock you flat on your shell.

Raph:
We gotta go after these creeps!

Splinter:
No. A wise ninja does not seek out an enemy he does not fully understand.

Leo:
But sensei, Bushido demands that we fight for honor and justice and-

Splinter:
Bushido also demands that that you honor your master's wishes. I will meditate upon this matter further. Goodnight.

Mikey:
Aww, under-grounded again!