That "backup release" thing. The bit of text you tend to see on self-bondage sites and then skip over. ("Always have a backup method of release available").
It kind of offends the brain of a self bondage fan. "Yeah but I want to feel totally helpless, not just have a spare key next to my hand!". So I'm guessing there are probably some standard approaches...
1 - Ignore it and just use a single trusted release method.
2 - Use two separate versions of your trusted release at the same time.
3 - Use two different release methods.
Ok so version 1 is obviously risky. Version 2 seems much better, except if your first release got snagged somehow, what are the chances you made the same mistake with the second?
Version 3 might be better, if you have two reliable methods, not just one that's your favorite and one you added because it seemed like a good idea. Any release including the backup needs to be well planned. It's also a problem if an emergency happens before either of the timed releases kick in.
Anyway, I'm here to advocate the 4th solution! Actually using a surefire backup release method.
The release itself is (in my case) a key tied to a string several feet away from where I am. The key string then leads on from the key to a jam jar where it's tied around the neck. If I really need that key I can always pull the jar over and drag the key to me.
The tricky bit is the psychology part. Read on...
Imagine yourself tied up feeling uncomfortable, you really wish you hadn't added that extra knot, or inserted such a large... or you already had an orgasm and just want it to stop before the ice melts.
Now imagine yourself tied up when you think you smell a whiff of smoke and all of a sudden the smoke alarms throughout the house go off.
You need to make pulling that jar over seem so unapealling that in the first scenario, you put up with the discomfort, you wait the extra hour cursing yourself and wishing you hadn't made this scenario quite so harsh, and wishing the jar with the safety release wasn't so well placed. If the smoke alarms go off. Panic will hit you hard and fast enough to make you pull the string anyway.
So what works as a deterant? I've seen a suggestion to use a gallon of motor oil which will probably ruin the carpet forever which is probably a good one. My taste is to have the jar filled with water & ink (or even just a water based paint mix, and yes I have used machine oil) on a shelf just over my open box of prized bondage / kinky goodies.
Which brings me to the final part of these thoughts... Since the safety release system will almost certainly ruin your prized possessions / carpet, make sure it's not going to fall over with the slightest tug. Use a jar with a wide base and only fill it 3/4 full to keep the center of gravity low. Leave a little slack in the line, and wrap some tape or something round it that you can feel (or use a different kind of string / rope entirely) so you don't tug the wrong string by accident.
As an added bonus I've found I tend to check and re-check my primary release more thoroughly (and I still use two of them!) Weirdly, the thought of a slim chance of some freak accident doesn't have the same power as knowing I'll ruin years of kinky collectables if the releases don't work.
If you've chosen a sufficiently nasty safety release system, believe me, you still feel the finality of the last click.[/i][/list]