The person leading the exorcism says to someone sitting in a chair “all your legions of poison - OUT!"
"In Jesus Christ's mighty name, by the blood of Jesus Christ, by the blood of Jesus Christ, you have no legal ground to be in here. You have to leave. You cannot trespass on the cross."
Someone named Umgar wrote on reddit (an entertainment, social networking service and news website where registered community members can submit content) that he recorded the video at a Starbucks close to his home, adding that it is often used by youth Bible study groups.
"This is the first time I've seen something like this," he wrote. "I watched for a while besides what's on the video because at first I thought it was a joke, prank or film project."
Umgar also included the dialogue between himself and one of the people in the group, which is hard to make out on the video as the exorcism unfolds:
Some have suggested that the video is staged, but Umgar insists that it was an honest-to-goodness exorcism.
"I stayed around much longer than the video shows, and I can assure you it was not an act or staged," he wrote on reddit.
"These guys really believed they were using Jesus to pull evil spirits out of this poor dude."