Creative way of showing a tangible version of a close button... but Cuberto is right, not so friendly to tear a photo up hehe

Inside (first draft) - iPad - UI/UX/iOS

Inside (first draft) -iPad by Cuberto. (link to 40 Innovative UI Concepts from Dribbble)

Great usage of interactivity with a sliding button

Peel Back

The Peel Back and Fold UI - by Juan Sanchez This looks like it could be a pretty cool UI, though it's a paper prototype.

It's not a CTA "button" per say... but man, does it make you want to press down on it!

Retro Keyboard