I believe I have seen the shack shakers 3 times now, and twice have their been strange occurances.
At the 400 bar (just a dive) in Minneapolis, the lead singer would rip out his pubes and throw them on the front row.
The second, the lead singer shot a snot rocket onto the front row (including me), and I gave him a really disgusted and pissed off look, as I sure deserved to be. He looked back and mouthed to me (I'm Sorry) and kinda gave a look that he actually didn't mean to do so.
Now, look past that, and don't stand in the front row, and, they are a pretty damn good band!
-BK