This video from last summer just had a viral explosion, being viewed 60,000 times (and counting) since just yesterday.  says he was learning extraction training from a fire fighter when they showed the group a very cool and secret technique to break a car window with no tools. Just by tapping on the glass with a certain speed and rhythm, the window gives way. 

Of course, this is the Internet and many users are crying foul and fake. What do you think? Could this be real, or is it an obvious scam?