The Teenage Mutant Ninja Turtles Learn a Valuable Lesson

Mainly, that Splinter probably gave them their weapons to do things other than cause environmental damage which momentarily incapacitates the bad guys. I mean, a giant rat hands you two katana, I doubt he’s planning on you using them to cut pizza and fling the slices into the faces of your opponents. They’re swords, man. They’re really sharp for a reason.