I was cleaning up house on my work computer, transferring the contents of folder A to folder B. After emptying folder A into folder B, I proceeded to dutifully erase folder B from the system.
There goes the totality of the data I was working on.
*bangs head against wall*
(It’s not as dramatic as it sounds: we do have backups, and I’ll probably get the data back tomorrow morning, but in the meantime I was left feeling rather silly).