On April 10th, 2008, James Karl Buck and his translator were arrested by the Egyptian police while covering an anti-government protest. James, a grad student from Berkeley, was able to tweet one word while being taken away by Egyptian authorities: Arrested.
This one update sparked his friends and followers into action, eventually leading to his university hiring a lawyer on his behalf and his release a day later. This is proof that one update, even if it’s a single word, can mobilize people to action and change the course of events.http://mashable.com/2009/04/10/extraordinary-twitter-updates/
Source : Mashable.com