"If you can tell me how long I've been dreaming," Sasuke said, staring humorlessly at Shin above him. The mocking made his hands shake, itch to wrap around his throat, but-- no. Not here. It wouldn't do anything anyway. "The human brain requires ninety to a hundred twenty minutes of rapid eye-movement sleep per cycle. Once I'm finished with that, I'll rest dreamlessly and be functional tomorrow."

He bit on his lip, grinning around his teeth. "Unless you want to see me when I'm cranky."