In what may be the trippiest Halloween costume ever, Mark Rober, a mechanical engineer at NASA, connected two iPads using FaceTime, with each one displaying the image from the front-view camera on the other, and attached them to the front and back of his torso.

The end result makes it appear as though you're looking right through a hole in his midsection.

The instructions he gives are pretty simple -- and it's one costume guaranteed to get people talking. Learn how he made it below.

[via Wired]