When a situation that is a chance occurrence , happens and is both coincidental as well one that makes you feel or, could make you look like a person that is less than intelligent.
I went to get a coffee and the intimidating and nice seeming barista that I've been trying to find a way to be friends with was working. I finally got the order spoken correctly except, for the last part when I told him to make it full. He gave me a confused look and then said, "Did you just tell me to make it fool?" Either I didn't say clear enough or he heard wrong. What a Coincidunce! I felt silly.