I needed a last minute Halloween costume this year. Came up with this remix of Devin Stawicki's iPhone 5 case at https://www.thingiverse.com/thing:85301 with an adapter to attach it to a $3 Harbor Freight Swivel Lens Headlamp found at https://www.harborfreight.com/headlamp-with-swivel-lens-45807.html.

Once printed, insert your iPhone 5 into the case. It's a snug fit. You will then need to remove the bolt that attaches the lamp to the base of the Harbor Freight headlamp assembly. Reassemble with the original bolt, using your new iPhone case in place of the headlamp part. Be careful not to over-tighten the bolt or it may place too much stress on the part. With just enough tightness, your iPhone should be able to flip down with a quick nod of your head, revealing the cyclops within.

To create the cyclops display, the easiest way I found was just to download a few animated gif's of creepy eyeballs and email them to myself. Once you have opened the email and allowed the gif's to download, you can disconnect the phone from wifi (even remove the sim card) and you will still be able to display the animated gif's of eyeballs by opening the email. You can change the cyclops eyeball by simply scrolling up and down, and zooming in and out, within the email to display the different animated eyeball gif's.

Quick video of post trick-or-treating couch lounging cyclops in action

Enjoy and Happy Halloween!