This isn't Mike's fight. He's got nothing to do with this, and him trying to pry them apart just pisses him the fuck off. This is important, damn it! And if Leo's too stupid to listen to him this time, he has to make him listen!

Mike gets shoved out of the way with hardly a second thought, the sting of his brother slapping away his hand makes his stomach burn with vitriol.

"Nothin' like Karai!? Just like Karai was nothin' like the Shredder? Just like the Shredder almost won you over with a freakin' sword? And you thought I was doin' nothin' but blowin' hot hair then, too!"

He isn't thinking when he grabs Leo's shoulder, hard, pressing his thumb deep into the old scar tissue, right into the joint he knows still feels the old pain. If Leo can't remember, can't learn, he'll remind him. He'll remind him so hard he'll have to listen.

He can't stand the idea of Leo getting himself into this mess again. He can't stand seeing him hurt because of the same dumb mistakes. He'll hurt him himself, first.

"But you remember this, right?" He snarls, just inches from his brother's face. "How's that feel? It ain't nice, is it!?"