Twitter is just amazing for getting the real world sentiment of news affecting people in real-time. But what could be considered scary is the ability to track those tweets to the geo location too.
I can even switch my view to aerial and see where and what building they are tweeting from. That is what happens when you have location turned on via the twitter app.
You can do all this yourself, visit http://www.plusonesocial.com and download and give it a shot. It is FREE.