Metallica drummer Lars Ulrich has caused an excited frenzy among Metallica fans after posting a photo on the band’s Instagram account, showing Rob Trujillo recording bass parts for… well… something. Along with the picture, which was posted on January 16th, the caption read, “Rockin’ along…”. Last month, Trujillo confirmed that the metal band were in the early stages of recording a new album, saying, “there are a lot of ideas, a lot of song bodies; you gotta go through the process. For me personally, I’m really excited about what we’ve been able to jam out“. If this is the beginnings of new material, it will follow the band’s 2008 album Death Magnetic. Metallica are also set to headline this year’s Reading and Leeds Festivals.