What is the Greatest Noise You've Never Actually Heard?

So far, the best noise I've ever heard is a bridge P90 through a Marshall tube amp at full tilt. I expect this to change the first time I get to see a Formula One car live.

There is nothing that makes me go as wild as the sound of a Formula 1 blown exhaust diffuser when the teams were allowed to leave the exhaust wide open when there was no throttle pressure. I absolutely lost it watching this video...

I am planning to go to a Grand Prix within the next few years, but the sad thing is, I will never get a chance to hear this 'off-throttle blowing' in real life. It was banned after 2011, and F1 will move to Turbo V6s next year, and I don't expect those to sound nearly as good after losing 3,000 rmp and all...

so, what is the greatest noise you've never actually heard?