In 1688, Robert Boyle (known partly for Boyle's Law, but also a groundbreaking chemist) published a document in which he described a misfortune.
He had lost some valuable papers. One might think that he had taken adequate steps to secure them, since they were held in a specially made chest of drawers which was locked at the time.
An assistant holding a bottle of concentrated sulphuric acid broke it over the chest of drawers and although Boyle was in the room at the time, the fact that the drawers were locked prevented his removing the papers fast enough to prevent the acid destroying them.
The moral of the story, obviously, is to be clear on which risks you are trying to minimize and why. #SRE
Source: Boyle Between God and Science (ISBN 9780300169317), p222