Elaborate???
At a Winnipeg show a couple years ago, it was outdoors with $5 admission because it was part of the Summer Vortex fair dealie, so any yahoo could get in, and they did. Lots of moshing and shit, and people getting hurt over the rope at the front they had instead of a metal barrier. He stopped during Hello Time Bomb to tell people to cool it, and also made a few remarks over the course of the show.
"The price of a barrier is starting to look real good right about now."
"For those of you who've never been to a rock concert before, this next song isn't for crowd surfing." (They played Blue Skies Over Bad Lands. People crowd-surfed anyway.)