Okay, it’s not just a random guy, it’s Rob Scallon, the guy that plays Slayer and Cannibal Corpse songs on banjo. This time, however, he made an actual metal song with some help from Unearth drummer Nick Pierce, who programmed the drums. “Metal Mad Libs 4” was sung by Eddie Guillen, who also performed on “Metal Mad Libs 3.” The lyrics consist completely of lyrics made from YouTube comments that he solicited a few weeks ago. If they don’t make sense, well, neither do a lot of lyrics. This is pretty fun and pretty stupid at the same time, which is perfect for a Monday afternoon.