Now, I know everyone here who has ever worked in the service industry will have had experience with this, but I'm sure even those who haven't will have a few funny stories as well:

Have you ever had a stranger come full-throttle rage monster at you for something completely random and/or ridiculous? Let's here it! (If you've got more than one story, share the most ridiculous). Then tell us how you actually responded...and how you wanted to. 

A prize to the winner with the best story (as measured by upvotes, so be sure to upvote your favorites!)