This is a nice little CTA hack for your next landing page. Designed by Jake Schoolmeesters this CSS only button has got a whack a mole look to it, it feels like its hiding till you hover over it and then it pops out from the page.
If you are having trouble with the pen, try the archived copy on GitHub
Pop Out Button Snippet
See the Pen Pop Up Button Idea by Jake Schoolmeesters (@schooolman) on CodePen.0