This is a flashback Tattle Tale.
When PlusOne was a youngster, he went to daycare. One afternoon, when dad went to pick up PlusOne, the headmistress called dad into her office. It turns out they served tapioca pudding for lunch that day. PlusOne not wanting to eat it, stood up on the bench (in the cafeteria) and yelled out "My dad says that tapioca is made out of fish eyes and I'M NOT EATING IT!" (none of the other kids at their pudding that day.)
(Dad had told PlusOne that because that's what his grandpa had told him, and dad thought that was really cool.)
The headmistress told dad that he had to find out what tapioca was made out of (the seeds of the yucca plant) and correct PlusOne's misconception. IMMEDIATELY.