His mind started rambling at all the torture methods he could use on the Potter parents. He was so far gone in his own uncharacteristically shown rage that he didn’t realize he was out of the memory and back into Wormtail’s mindscape. There were very few things that could break his mask, and hurting what was HIS definitely was one of them. The Dark Lord left his mind and his magic started swirling menacingly in the air. He definitely needed an outlet or there was a chance he could hurt himself.