That wasn’t what I said at all. Toothless showed that preempting the fiery launch could make it backfire; he demonstrated it on a small dragon that was trying to steal a fish.
It was Hiccup who extrapolated the strategy to gargantuan proportions. (He also prepared the trap by degrading the flight capability first.)
And keep in mind, fuel/air explosions are entirely different phenomena from volcanic release; the fire is a match flaring up, while the volcano is a soda-can pop-top.
OK, I’m convinced. We’re now writing our procedures for Plan B.
If a volcano opens up in or around the vicinity of LA we will drop Michael Moore into the opening in the hopes that the plugged vent will cause the eruption to occur in a less densly populated place. We will hold Rosie O’Donnel in the helecoptor as a reserve.