Like Moot said a Shuttle launch !!
I went down with my wife a few years ago to watch one, she said she wanted to see one before he vision got any worse. It was incredible, we aquired a VIP pass to the viewing area at the Cape, not only could you hear the noise but you could feel it deep in your chest.
There is a long funny story attached to that VIP pass so I won't bore you with it for now but suffice to say it made my wife very happy, with her vision now practically gone at least she's got that memory.