How to make a Jet Engine from your used SuperJam jar!

Make Magazine produce weekly online video project guides, providing instructions on how to create various gadgets and experiments from household objects.  I love watching the videos and the things these guys make are usually pretty useless but very fun.

To celebrate the 1st anniversary of their 'Weekend Projects' series, they decided to build a jet using a jam jar.  

Since it was in some way relevant to jam (but overall just very cool), I thought i'd post it on the blog.  You can check out the video here.