A pair of residents at a German assisted living facility caused panic among the staff when they couldn't be found. As it turned out, they sneaked out so that they could attend the Wacken Open Air Festival.

The news was reported by Deutsche Welle, who say that the police were called. The headbangers were discovered on the festival grounds in Schleswig Holstein at 3 AM. They didn't want to leave the event. but police nonetheless sent them home in a taxi with an escort by a patrol car.

This year's Wacken Open Air, considered to be the world's largest metal festival, features headlining slots by Judas Priest, Danzig and Hatebreed, with performances by Vince Neil, Dokken, Tremonti, Cannibal Corpse and Fozzy, among many others. The festival is sold out, with 75,000 people expected to attend each day.

Wacken Open Air is famous for a muddy ground, but the region has not experienced any rain in the days leading up to the festival. Instead, organizers have warned against the possibility of fire and dust. Police say that, as of now, the only arrests they've made have been for minor cases of drug possession.

To help combat the heat, beer is being transported to the grounds via a seven-kilometer pipeline. This, they promoters say, will protect the grounds from being torn up by the trucks that have always brought the beer and reduce traffic in the area. The pipeline contains enough pressure to pour six beers in six seconds, fast enough to satisfy the average daily demand of 5.1 liters per fan.

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