I just recently signed up for NetFlix to get my videos over by mail. My wife in particular pointed out to me how nice the descriptions are being shown in a pop-up. Thereafter, I noticed that they have done super cool UIs all over their website. One of the things I got curious about was the way they showed descriptions of the movie by poping up a box with an arrow. The nice thing is that the box has a transparent shadow/glow in the back. I wanted to impress my wife and show her that this can be done easily. This article will show you how to show a pop up like the one mentioned above, both statically and dynamically by using the AJAX Control Kit's HoverPopUpMenu.