Diner-saur

Today, when teaching my ill-fated lesson on words that end with "er" I had a funny response shouted by a student. I asked the students which words they didn't understand. One student said, "dinner." I only had "diner" on the sheet. I wrote both dinner and diner on the board to explain. When one student, who was barely paying attention, saw "diner" on the board, he immediately shouted, "Dinersaur!." He was so sure that he had the correct answer (even though I hadn't yet asked a question.) I had to chuckle.