Animated ads that land on a web-page and float over the page for around 5-30 seconds. While on screen they block the user’s view of the page they are trying to read and can also block the use of the mouse during the time they are visible. They are becoming increasingly common as they grab the viewer’s attention and are difficult to ignore. This is because they appear out of nowhere, are animated, can have audio not just visual content, and they can fill the entire screen.