After cutting a few contractor bags into strips, I bet Monica she couldn't get out of them. I wasn't sure who would win until I secured the find strap around her body. I think she could sense the outcome just then as well. As she pulled and struggled to get free, nothing could move, at least not for long. What little give it did have snapped back like a rubber band, exhausting her more. Unlike rope knots, these are nearly impossible to undo once they have been tied. It doesn't help her situation when they are triple knotted as well.