Well I know this particular aspect doesn't have anything to do with tactics but that one 911 operator is a little odd.
The 911 operator says
Maam, did you shoot
AGAIN ?
It's like he's exasperated. He doesn't say "Maam, what happened?" "Maam I thought I heard shots, are you alright?"
No, it's like "Are you still shooting that guy? Enough is enough already... when are you going to stop?"