Leonard isn't sure how long it took after Mick left for him to really calm down. 'Awhile' is about the best guess he had in hand. Once he calmed down enough that he remembered what breathing felt like, he got to his feet and made his way into the living room. He turned the tv on in hopes that it would distract him enough to prevent him from getting too stuck in his own head and spiraling all over again.

Presumably, it worked well enough, because he didn't find himself panicking again. But he wasn't really in a good state to be found in, either, when Lisa wanders in at late-o'clock.

He blinks, hard, when his sister suddenly fills his field of vision. "What?" he mumbles, coming out of the haze he always ends up in after something like that. "Oh, hey, Lise. When'd you get get home?"