01/05/2012 04:10 BST | Updated 30/06/2012 06:12 BST

How To Explain Facebook (And Its IPO) In 150 Seconds [VIDEO]

Got friends returning from a four-year stint on Mars, or elderly relatives who still don't get why Facebook is such a big deal? Want to spark a discussion about whether the site is worth its $100 billion valuation? Then you could do a lot worse than simply screening this video.