Human Knotting Video
Unlike the Siamese Human Knot, the torture involves ropes, but the video does seem to suggest at least some links between reality and fiction.
You can order the video here:
The next two vid-caps are of what the program calls a "pretzel torture."
Information about such positions, also known as anundals as well as Human Knots, has been posted on this site for years.
This final vid-grab also echoes some of "Batman's research."