A 93-year-old woman was locked for 23 hours in a bank vault in total darkness in the French city of Rennes.
The old woman came to the bank to use her safe deposit box at 11:30 am on Saturday. Likely forgetting she was in the vault, the employees at the bank closed the vault and the branch.
The bank was to remain closed until Tuesday.
Unsurprisingly, the 93 year-old did not have a portable phone. Luckily, her concerned son called police 20 hours after she first went missing.
More from GlobalPost: Alaska mayor Stubbs the cat badly injured in dog attack (VIDEO)
After tracing her steps the day she went missing, police visited the BNP Paribas bank where she was a client.
After contacting the bank security guards to open the branch, they found the woman in good shape, yelling through the doors. She was said to have been very thirsty when she was discovered.
An investigation is currently underway to find out exactly how this could have happened.