After sneaking into Disneyland more than an hour before opening (it’s amazing what you can do when you’re disguised as a planter), our Official DisneyLies Photographer managed to snap a picture of an Imagineering test of the new Antimatterhorn.

This Matterhorn overlay — accomplished in minutes thanks to billions of carefully installed, computer-controlled black-light LEDs — is intended for use during this year’s Halloween festivities. Rumor has it that, when the Matterhorn is in “evil” mode, the mountain will not only look evil, but the cars will also be fitted with super-bumpy wheels and the Yeti will have a really, really bad haircut (sort of an “abominable mullet,” according to an Imagineer).