A guy on the way home from school was passing in front of some cave which was famous for its echo. Every day he was screaming silly sentences to hear the echo back. That day he cried: "I got a 10 at chemistryyyy!" and the echo replied back "Nooo, you got a fourrrr!"
Not that it could mean anything for my daughter... (see my "note (2)" here: https://www.duolingo.com/comment/19901243) hehe