Unrelated to him but still fantastic.
Customer: You did a data transfer for me but some of my documents are missing.
Me: Ok well we will get to squared away. What was the name of the file(s) that are missing?
Customer: I dont know.
Me: Ok where were the files located?
Customer: I dont know.
Me: What program were they made with?
Customer: I dont know.
Me: What did the files contain?
Customer: I dont know.
Me: If you dont know the name, location, type, or the contents, how do you know they are missing?
Customer: I dont like being talked down to.