"I'm used to doing it without mirrors, but I'm also used to having my father breathing down my neck if my posture slips, so the mirrors might be good after all." It was a different kind of experience, running through things alone without input from Splinter or good-natured needling from his brothers.

As for the rest - well. "Lots of things are good for more than what they're meant for. If it works, I'd say go for it."