This position was actually suggested by River herself! My beautiful studio assistant made a remark when she was giving a tour of the studio (for a custom video) that she could be attached to the wooden wall when she saw the metal D-ring was still screwed in place. I put her in a box tie armbinder and gagged her, then attached her wide collar to the wall with a chain. Although some time later, I decided: why do we need a chain at all? I just locked the collar directly to the wall! Very restrictive! Don’t miss this if you are a River fan!