Interesting video of ordinary folks getting asked if they knew what a 'blog' was, and what 'Twitter' was. You may get it but not everyone does. Albeit the videos were shot in 2004 (BLOG) and 2008 (TWITTER) but the point remains that leading edge technology is leading edge for a reason - not everyone gets it immediately like you.
I laughed a bit at the answers and also appreciated the fact that the videos were from all over the world. Enjoy the faces of some of the older folks as they react to the question 'Do you Twitter?'. My favorite answer - 'I hope I'm not Twittering right now'.