
Please have a look at these videos and you will come to a better understanding!
Video Link No: 1: http://www.youtube.com/watch?v=zXQPmNf5xXw&feature=related
Video Link No: 2: http://www.youtube.com/watch?v=HdL2LOwXA48&feature=related
Video Link No: 3: http://www.youtube.com/watch?v=mX4olIYlw4Q&feature=related
