Trevor looked down at himself and saw that he now had tanned skin and muscles. He looked up at the old man and glared at him.
"Let me take these off," their captor said, as he began to take off Trevor's gag.
Once he did, Trevor yelled at him. "What the fuck did you do to me, you fucking asshole?!" Then his eyes went wide, after hearing his voice.
"I think you just answered your own question," the old man said, as he continued to remove their gags.
Trevor turned his head to the left and saw Jay, Jon, and ... himself?
Jon looked down at himself. He was now pale and lanky and all dressed in black. He didn't know how it was possible, but this crazy old man actually caused them to swap bodies. And Jon was now in Trevor's body.
Jay looked to his left and saw himself. It was obvious that the machine had caused them to swap bodies, but (being a geek) he was interested in how it was able to do it. He had never heard of something like this, except from science fiction stories. He looked down at himself and saw that he was now in Jon's body.
"I can't believe I'm in this loser's body!" Biff yelled out, hearing Jay's voice instead of his own.
"You better get used to it," their captor said. All four guys turned their attention to him. "You're going to be like this for a while."