Charles: Jake, what's going on? Why is Amy's hair like that?
Jake: Oh, she obsessively braids her hair when she's nervous, and she's super nervous 'cause she's taking the sergeant's exam today.
Charles: But Amy loves tests.
Jake: Not this one. It's always been her plan to be the youngest captain in the history of the NYPD, but if she doesn't pass this exam, she's gonna have to wait another three years to take it again, and that'll disrupt her entire life calendar.
Charles: Is that a real thing?
Jake: It hangs over our bed.