Movie Godzilla is actually more durable than Slattern. The guy saying 'megatons, not kilotons'? Flat out wrong. The one that it showed them trying to kill Godzilla with was the Castle Bravo test, which was a device with a yield of 15 megatons. Which Godzilla survived a direct him from in open air this continuity.
Meanwhile ín Finland, Summer vacation ends tomorrow.