[url=http://www.youtube.com/watch?v=KDRAhiBtOrQ]Post the first part of any sentance from any youtube video, then paste the video link on forums, then see who can figure out who can watch the video and complete the sentence!
Example
you would say: this is...... [url=http://www.youtube.com/watch?v=KDRAhiBtOrQ] answerer would say: SPARTA!