Given that this point is a vital part of Leo's being rescued, Donnie's a bit surprised that it seems to have slipped from his mind. Unless...

Something like worry flickers across his face for a split second before he shakes his head. No, focus on this!

"The whole 'mystic hands' thing? He tore open a hole between us and the Prison Dimension to get you back," Donnie explained, watching Leo carefully as he does so. "Raph pulled you out, but that Kraang guy was right behind you, and I wasn't letting him have you."

He winces, glancing down before forcing his hands to loosen from the tight balls he'd wrung them into.