"Breakfast" and being helpful

My first grade classroom was right next to the principal's office.  Our school did not have a public speaking system installed then so when the office needed to get a message to a given classroom teacher, a secretary would duck her head into the first grade next door.  That was a signal to me to stop what I was doing, go to the principal's office and deliver a note, sometimes up a floor to a classroom.  I was honored to be the reliable messenger and I usually understood the lesson I was temporarily leaving.  

However, one day the teacher had just said that the word "breakfast" was interesting when a secretary's head appeared.  I got up and did a delivery but for years, I wondered what the teacher had said about the word "breakfast".   Later, I figured that she said when I eat 'break-fast', I am breaking the fast of the nighttime.