Last week, Charlotte hosted Sabaton’s battle metal, which turns military campaigns into power rock. Now we get the yin to battle metal’s yang with Okilly Dokilly’s “Nedal,” diminished fifths devoted to Ned Flanders, The Simpsons’ uber-geeky Christian neighbor. Credit Okilly Dokilly’s with a killer gimmick. They became a viral sensation just on the strength of their nerdy press photos! Openers Beatallica mash-up the Fab Four with Metallica, insuring a full evening of ear-bleeding weirdness.