Ask HN: What is the worst that ever happened when you slipped with a mouse?

One time i was on filezilla FTP and moved a folder to the parent folder. I slipped with the mouse. The application recreated logs and all the parent folders. Filezilla got crazy. A simply undo or re-move was tricky. I only slipped with the mouse. 30 min downtime.

Has something similiar ever happened to you?