I wasn't going to but I ended up watching The Amazing Race on Channel 7 last night. I thought that the challenge to find one padlock amongst 3000 that would open with a key that you picked was pretty damn difficult.
Miky turned to me and asked if I had any problems opening the post office box as she found the key quite difficult to get in sometimes. I mentioned that perhaps she was doing the same thing as the contestants on the telly and trying all of the post boxes. No, but she did admit to looking up the number in her address book a couple of times. And then she said she had left in disgust when she hadn't been able to open it a few times!
Very similar scenario to the show, don't you think?