When I was five or so I had a pal, Johnny, who was famous in my family for being 1) a rich kid, and 2) a spoiled brat, always whining about something.
For some reason, maybe his folks were traveling. he stayed overnight with us once. In the morning, Mom was rushing to feed everyone before kindergarten, school, and work, placing our cereal bowls in front of us and cereal and milk on the table.
Johnny started up whining, "There's a mouse in my bowl!" He said this several times, as my mom and we kids, chowing down with vigor, ignored him, figuring he was just complaining as usual. Finally, I looked over and down into his bowl and, sure enough, there was a mouse in there!
When I announced that fact, Mom came for a look, and then told me to dump it outside. Gave l'il Johnny a new bowl.
She figured she conked it out when taking the bowls out of the cupboard in a rush.