I've used this one. I saw it once, then couldn't remember where I saw it and couldn't figure out how to do it, but after much searching found it again. It is INDEED very tight and hard to get out of. Feels great though if you have plenty of time and aren't worried about how long it takes to get free. Blindfolded and sitting cross legged tied and this behind the back, EXCELLENT. Make sure your blindfold is very secure and no light visible from underneath. Total darkness, no cheating.