I stumbled across this video on You Tube while checking out footage of the 2016 “Shin Godzilla” film (aka Godzilla Resurgence) which I haven't seen but reviews by others suggest this is a retelling of the original
1954 “Gojira” (Godzilla in the US). Anyway, the atomic breath effect of this updated Gojira is said to have been copied from “Giant God Warrior Appears in Tokyo” (2012) which is roughly a ten minute short that employs this electric
breath effect merged with miniatures in a striking way. All the videos of this short that I have seen thus far are in Japanese (some with subtitles) and its a little slow going for the first three minutes or so but once you get past that section, hold on to
your hats!. Cut and paste the link below into your browser to view. Enjoy.