They're crazy, but in a good way.. The band members jump off into the crowd, and there's tons of moshing.. but if you stay on the sides you'll be ok haha.
When I went I was in the VERY front, but all the way to the side, by the amps and stuff, and I was fine. The moshing is definitely only in the middle, and most people aren't a**holes, they won't push you in or anything.
It was the best show I have ever been to, I HIGHLY recommend that you go, you won't be disappointed! And if you do go, make sure to stick around after the show, because the band stays and meets every single fan!