When a boy is trapped in a combination safe:
Family members found the 9-year-old in the metal vault, but couldn’t unlock the door because they didn’t know the code. The grandfather, who was the only person who knew the six-digit number, was away from the home at the time...
The family called firefighters, who typed in every possible combination to unlock the door. Firefighters pumped oxygen through a crack into the safe to help the boy.
Three hours later, firefighters were about to break the safe open when someone finally cracked the code and freed the boy.
Since not even Mavis Beacon running on a quad-core i7 could type fast enough to try a million codes in 3 hours, I’m assuming they tried the most common sequences first and hit on the correct one.
Though it does say someone “cracked the code, maybe with an old school stethoscope?