[A Jacuzzi party on Mont Blanc](http://gizmodo.com/gadgets/jacuzzi-high/mont-blanc-jacuzzi-party-at-15711-feet-was-low-on-oxygen-high-on-booze-309708.php) (4,807m above sea level).
It’s safe to say that there isn’t a great long list of reasons to do this, other than ‘why not’. It’s an impressive display of effort to actually make it all happen.