words I like: an occasional series - exhilarating

Another one of these occasional words, kind of the small feature table of content on takeoneonion, still we are at number two. Exhilarating, the very word fills you with excitement and premonition. In fact the root of the word is from Hliarus, meaning cheerful and gladdening, though today it has connotations of thrill-seeking. I quite like the wordreference definition connecting it with mountains, certainly walking in the alps is definitely exhilarating. The Merriam-Webster gives a more factual and latinate definition.
So what was the last exhilarating thing you did ?