Re: Only cracking I have done is
I was once waiting in reception for an interview at a security company.
Someone came in, went into the internal door, which had a keycode lock. She hesitated, and looked towards the security guard, who called out "3285" so she could get in....
(Just to add to the fun, I didn't get the job - I was a contractor, but for some reason the agent had sent me for an interview for a permie position.)