Knock Knock !!!
While you were causally browsing through the pulse feeds, the first thing that got your attention was the Knock Knock title. You suddenly felt like this post wants to visit you, and you should stop by. Then the very next thing that sealed your attention to this, this image of someone knocking on the door, which visibly knocked on your subconscious that you must have a go on this post. And that's the whole idea. An image, and a loud text. That is VISUAL MEDIA. Just assume what