Much of the world enjoyed a jolly Christmas Day this past Tuesday, including prisoners in an England prison. After a video appeared online and went viral of inmates dancing to “Whoomp There It Is” by Tag Team, an investigation is now under way.

The focus of the investigation is looking into how the prisoners gained access to a mobile phone. Mobile phones are not allowed in prisons. The clip is believed to have been filmed by a prisoner in HMP Lancaster Farm in North Lancashire, reports the Daily Record.

The video has been posted on a couple of Facebook pages so far, receiving upwards of 500,000 views and over 2,000 comments.

The whole scene is like something out of a weird alternate reality, but it is indeed very real.

A Prison Service woman said: “This behaviour is unacceptable and will not be tolerated. We have recruited an extra 3,500 prison officers over the last two years and are investing an additional £40 million in safety and security. Anyone found with a mobile phone faces extra time behind bars and we are spending £2 million to detect and block them from being used.”

Watch the video via Mirror below.