What I was talking about earlier

This video of a ZSU-23-4 anti-aircraft gun being used in a direct fire role in Syria shows just how quickly this thing can be brought to bear in a fight.  I didn't realize that the turret could turn so quickly, or that the gun could elevate and depress so quickly.

You might want to turn down the volume if you're somewhere the sound of gunfire and "Allahu Akhbar!" will turn heads.