Jiraiya would be turning in his goddamn grave.
I still find it hilarious that the whole reason he left Konoha was because he was salty as shit about Sarutobi not letting him be the 4th Hokage, and Minato was already so over-powered that he knew he couldn't do jack shit about it.
To be fair, the Naruto series was always one where a ton of people did things for super petty reasons. Danzo was salt for not becoming the 3rd Hokage. Madara was salt for not becoming the first (What the second 2 was dirty though, but then again what Madara did right after showed the second was right)
I also love how in Part 1 the series tries to make us think Sasuke is some kind of Prodigy and awesome. Despite the fact that besides the end of Part 1, there was no point in time that Sasuke was stronger than Naruto.