Alas it was another day with Godzilla and Rodan going around the world doing something stupid since neither of them had anything better to do with their time but they eventually realized upon finally fighting a horde of obscure monsters they didn't recall battling that a realization came to them.
"You know Big G we could have done this earlier in the story." Rodan pointed out upon gliding at supersonic speeds to cause the various buildings to collapse on the kaiju.
Godzilla blasted away the creatures with his atomic breath upon having his tail slam against the earth to cause several tremors. "Perhaps that's true yes but where would the fun be in that."