Godzilla's exit from Mt. Mihara, set to music by Akira Ifukube from Ostinato, specifically, Godzilla Title.
Godzilla finally did the one thing every kid played out with their toys: shooting his breath weapon down another monster's throat.
And it was so utterly awesome, they reused it in the 2014 reboot.
The precognitive children drawing their dreams. They all had the same dream, which they show to their instructor happily: Godzilla in the volcano, surrounded by flames.
The agent is finally killed, mere moments before shooting Kirishima and after stepping onto one of the lightning generators, only to be disintegrated to nothing. The man to finally take out SSS9: Kuroki.
Gondo firing the ANEB rocket into Godzilla's mouth as he utters his one-liner before Godzilla kills him.
The massive Battle in the Rain Godzilla has with the JGSDF while they light him up with the M6000 Thunder Control System.