Another sleepy time reference I missed before. In 30-3 (around 8:55), CJ has just arrived at the elementary school to rescue, Saul, Victor, Glenn, and Pete. The 4 boys have to get out of the room and hightail it across the area to get to the vehicle. The do some zombie fighting along the way (sounds like Victor does a text book Mozambique drill: 2 shots center mass, 1 shot to the head) and jump in the vehicle.

Some banter back and forth as they get underway. Then, in the middle of the discussion. Saul goes lights out. just falls asleep.

The Victor does the same after CJ tells him it's ok to do it.

Not saying it's Zombie related, but hey, it's another data point.....