Maybe "blown" is a better word, but the point is the only thing stopping exhaust going up another nozzle is it's own pressure. I read about it here I think: ht

Maybe "blown" is a better word, but the point is the only thing stopping exhaust going up another nozzle is it's own pressure. I read about it here I think: https://www.space.com/38016-spacex-falcon-heavy-rocket-maiden-launch-success-chances.html https://www.space.com/38016-spacex-falcon-heavy-rocket-maide... > If one engine doesn't ignite internally as it should, you will get a flame front that travels back into the engine." > "That creates a pressure spike, and that can cause what we call 'rapid unscheduled destruction' — and that's bad,"