Audio problem: In the theatrical cut only, there is a scene where Willow goes into Howie's room and wakes him in the morning. She is heard to say something like "Wake up Sergeant", but her lips do not move.
Audio problem: On his way to check out the school, the Sarge witnesses a group of kids involved in the Maypole song. During the song, a kid with a mouth harp is strumming it every single time he's in frame, but that included large parts when the instrument is in fact not part of the diegetic song.
Answer: What's the use? He's surrounded, he can't fight everyone and there's nowhere for him to run.
BaconIsMyBFF
He is also a fundametally religious man and he believes that he is going to die and go to heaven.