Self-bondage Challenge
If you are left-handed, then press "Continue" and skip this page without reading it. I will give you the left-handed version of these instructions on the next page.
Right-handers, set the key to the handcuffs just behind you on the floor. Then reach your left hand behind yourself and across your back, and lock it into the cuff on your right side. Now, without locking your right hand in the other cuff, reach your right hand behind your back, under your left arm but over the belt, so it is near the cuff on your left side.
Now keep your right hand in that position near the left-side handcuff, and pretend that it is also locked in. With your right hand in that position, reach down and get the handcuff keys, and free your left hand. Obviously, if you are unable to do so for any reason, then pull your right hand out from behind your back and use it to free yourself. Then do whatever you need to do to fix the problem you had, including getting looser handcuffs and re-tying yourself if necessary. Once the problem is fixed, repeat this test without actually handcuffing your right hand.
Do NOT continue until you can easily and repeatedly free yourself from this position, while keeping your right hand in position as if it were handcuffed. Once you are certain that you would be able to free yourself with your right hand cuffed, you may press "Continue" twice, skipping the next page's instructions for left-handed people.