How did Combichrist (electro), Hocico (electro) and Misfits (punk) end up on the bill of a metal fest?
no idea about the first two but MIsfits fit more on a metlfest bill than a punkfest bill. Most of Misfits fans are metallers, anyway. MIsfits pop up on the bill of a lot of European metal festivals as well. As do quite a few other punk bands.