I don't believe Brad didn't make the trip because he didn't feel like it. Maybe he doesn't go crazy when they're playing the heavy stuff, but it's only natural he wouldn't enjoy playing every single song. And keep in mind he has a serious back injury, so he can't really jump around like the rest of the band members. This doesn't mean he would just skip shows when he is a little tired. Also, the back injury is the perfect example for how commitment he has for playing shows. He literally couldn't MOVE the day of the St. Petersburg show, and he still played. I believe that if he didn't fly to Brasil, he is really sick or his back injury is getting worse. I Hope everything is okay with him, and that he will be back for the LA shows.