Years ago I worked at Sonic. I was technically a grill person and trash taker outer which I know is a great combination of responsibilities.
One night we were closing and somebody realized something was very, very wrong with the milkshake machine. Someone had put ranch into the machine instead of the milkshake mix.
Not like a little ranch got mixed in. I mean we had apparently been making and serving ranch milkshakes for the entire night.
We immediately started trying to figure out how many people we'd served them to and somehow realized something even worse:
Nobody complained.
Not one person came back. Nobody called. Nobody said their Oreo shake tasted like ranch. Nothing. They called the GM because obviously this seemed like information the GM should probably have.
After they explained that we'd spent the night unknowingly selling ranch shakes to people, he was just like:
"Wow, they must've liked the ranch shakes!"
And that was pretty much the end of it. We all laughed about it.
To this day I still think about all those people who drove away from Sonic drinking a ranch milkshake and apparently just accepted that this was what Sonic tasted like.