I love subtle animations on websites and if you remember we had an awesome owl and yeti login page recently, this particular design comes from Agathe. There is an email unsubscribe form with a sad looking envelope and when you hover over the unsubscribe button the page cower down in shivers and on click it shows a really sad face. If you hover over the cancel button it looks happier and on click, it jumps around in joy.
If you are having trouble with the pen, try the archived copy on GitHub
Email Unsubscribe Snippet
See the Pen Animated Unsubscribe Page by agathaco (@agathaco) on CodePen.0