Review Detail of Earl_John_Calderon_2010 in Reincarnated In Naruto [Naruto Fan-Fic]

Seriously, it's really annoying when the author made him powerful without giving proper details on the process...like how tf did he suddenly gained the knowledge of Flying Thunder God, an S-ranked jutsu...don't tell me that he gained that while he was in Orochimaru's lab, and if it really is, then this just funny or maybe he learned that in his past life, and if that really is, then that's just dumb.