In the latest episode of his web show, internet-famous game console modder Ben Heck whipped up a Portal-inspired shirt with a wide hole that allows you to peer through to the other side of its wearer's stomach -- perfect for a geek or gamer's Halloween costume!

Heck assembled the outfit with a white t-shirt, a CCD camera, an LCD display, and a battery pack (with 10 rechargeable Ni-MH AA batteries). You can watch him put it all together and learn how to make your own Portal shirt in the episode embedded after the break:

[Via Technabob]