This literally caused me to have a bad taste in my mouth when I was in high school:

My yearbook advisor sent yahoo mail and asked what I would like to be picked up at Starbucks for an early morning meeting the next day.

"Caramel Mocha, thank you!", I replied.

The next morning, I was surprised with an undrinkable "Caramel espresso" - an espresso with a pump of caramel syrup. I thought she had made an innocent mistake and was shocked to see there was in fact a difference between my sent text and her received text. I had no explanation.

After some years in web dev, and encountering this article, I realized that, as the precursor to javascript - the script type "mocha" was valid, so yahoo just went ahead and replaced all references to mocha with something that probably seemed innocuous to a junior developer - except it wasn't.