User blog comment:B214/High School DxD New Episode 3 Discussion/@comment-16075832-20130722160729/@comment-16075832-20130722215418

I think it was supposed to be. In the light novels, he learned from this since he used his Boost Explosion too early (he was kind of forced to anyway) and found out later that he hadn't Boosted his power enough. This was omitted from the anime.