He was alluding to the DL ATL ER Capitan that blasted his FO for calling out fatigued mid rotation last week.

Capt had just driven to work to start his 4 day IA.

FO was on day 3 of 4, had already flown one leg (Midwest to West Coast), pushed, gate returned, push again, flew Transcon West Coast to ATL, then had the audacity to throw in the towel before the ATL-JAX leg which was now going to land after midnight.....the nerve!