[al_c]

And a water cannon went off to the right (our right) of the stage.

I don't think that was a water cannon. I think that was a hydraulic line on a forklift holding up speakers. Likely got hit by gunfire.

[cgbg]

Yup—there were reports of a hydraulic leak caused by one of the shots.

[silent_jonny]

Oh hydraulics. That makes more sense. I said water cannon because it was the first thing that came to mind.