The Swiss ski resort of Engelberg is now offering mountain-cleaning courses for real after international interest in an April fool video. The video featured people hanging of mountains on ropes with brushes and other cleaning materials. The joke had such a global impact, the resort is now using it as a marketing tool, and Brunni cableways, the resort's cable car company, is now offering mountain cleaning lessons. ...Participants will receive a special mountain-cleaner badge.
The video was translated into six languages, and more than 30,000 people completed the spoof application to become a mountain cleaner in the first 24 hours after it was posted.
See here for more info and video:
http://www.engelberg.ch/en/Aktuell/index.php?id=649&year=