Godzilla's atomic breath first took on its bluish hue and beam-like shape in King Kong vs. Godzilla, and it maintained that shape throughout the movies of the Showa Era (1954-1975), Heisei Era ...

This action overrides Godzilla's atomic breath, causing a massive explosion that annihilates the monster. Fortunately, Shikishima ejects from the plane before it collides with Godzilla.