I got regular complaints from a client that the DVDs I gave him were corrupted. After several irate phone calls, I went down in person to check out the situation. His machine was in working order, his disc drive was functional, and after testing all of the DVDs he claimed were corrupted, I saw he was correct. 

After berating me for my idiocy, the client went into a full-on rant about how my stupidity has cost him both time and money. I apologized profusely and offered him a DVD that I triple-checked was working.

He then slapped it on the nearby filing cabinet and kept it in place with a large magnet. 

*Editor’s Note: Our readers have pointed out that DVDs do not get erased by magnets. I can only assume this story was originally about a 3.5” floppy that the submitter tried to update.