Nap
They were up all night trying to catch a killer… even though they finally did; most of them were half-asleep trying to wait.
When the next day came, JJ couldn't get a lick of sleep that night. She was exhausted but her mind kept racing! The only thing she could think of what had happened the previous night. It was a hostage situation and she was a part of it; she was even help at gunpoint.
She had trouble driving, concreting, eating and working. Rossi even asked if she wanted to take a nap and she said no. She finally gave up and gave in… she decided to take a nap. She lied down on the couch and immediately fell asleep. She slept all day because everyone started to notice. They didn't disturb her though, they knew she'd be angry and they knew she didn't get much sleep, too.