I, too, saw this video recently. That's similar to the method that I've used for years to be able to lock myself up, yet still be able to release myself--but with time and effort. It's not really as easy as it appears in the video as different combinations seem to result in slight variations of the amount of pressure needed and/or the ability to detect a "click". But I've never memorized a combination to any of my 3 combination locks because of this. It can sometimes take 10 seconds to crack the lock, but sometimes up to 10 minutes if I get a really tough one.
Great for not-so-secure self-bondage, HORRIBLE idea for actual security. I'll never recommend using these types of locks to anyone buying them for use in security situations. They'd get robbed blind!
~Mrs. Locks~
