When it comes to speaking with their hands, the Italians are masters. Many gestures are just meant to emphasize normal conversations. Some others belong to the category of Parolacce (bad words). This video summarizes some of the most popular hand gestures that you may happen to witness in your next trip to Italy.
Beware, you may end up learning more than what you wished.
UPDATE: Within 48h from its release, this video has already gained 6 YouTube Honors, among those the #16 most viewed travel video and #15 top rated travel video.