The fourth-annual Frightened Felons event, put together by the Idaho State Historical Society, turned two cold, dark evenings at the Old Idaho Penitentiary into nights of freaky Halloween fun.
After a family friendly evening Friday, Oct. 26, the prison enlisted the folks at Crooked Fence Brewing for adult beverages and far spookier themes Saturday, Oct. 27.
A big draw for many patrons was a haunted house in one of the facility's cellblocks. The already spooky barred windows flickered with strobe lights from inside the building as a long line queued up to go inside.
Within the pen's walls, actors portraying felons of the past interacted with visitors, often springing on them without warning. In the solitary confinement facility, nicknamed "Siberia," actors stepped out of the shadows to frighten flashlight-wielding explorers.
However, judging by the smiling faces on the numerous costumed visitors, the event wasn't merely morbid. An organized mass performance of Michael Jackson's "Thriller" was followed by a costume contest, which included a blue-skinned woman as an Avatar and a group of sparkly '70s disco dancers.
Overall, organizer Amber Beierle said the event sold out at more than 2,000 tickets.
Check out all the spooky, kooky action with this slideshow.