Mood Whiplash: From intense fight against Hedorah and race against time to Godzilla flying backwards with upbeat music playing.
Narm: Godzilla flying backwards with his atomic breath.
Narm Charm: Typical with a Godzilla film but a special case is the Japanese 'Save the Earth' theme. The chorus of 'save the Earth' is weak during the movie's opening but by the end has grown in a strong and passionate chorus.
Nausea Fuel: The sludge in the bay, which was mostly real.
Nightmare Fuel: For the first time since the first Godzilla, human death is shown graphically. It's especially unsettling is that in one scene where a baby is shown drowning in Hedorah's sludge.
Signature Scene: Anyone who knows anything about this movie knows about Godzilla's flight sequence.
Some Anvils Need to Be Dropped: In 1970s Japan, pollution levels were far worse than in the USA due to rapid post-war industrialization with no governmental checks. Despite its silliness, this movie was as relevant to the fears of 1970s Japan as the original was to the atomic fears of 1950s Japan.