A few years ago I was working as a laborer in the Italian alps fixing chiains and metal steps for hiking trails (we call them via Ferrara in Italy), we were working at altitudes between 2500 and 3000 meters and then only way to get our heavy equipment up there was to sling it in by heli; needless to say the local company that operates As350 b3's did an awesome job for us. A few months after witnessing the awesomeness of that machine at work I decided to train as a pilot!