I've once had a bunny a long time ago. My younger brother got a speciality of bothering animals and the bunny wasn't an exception. One day as my brother always did, he kept bullying that poor bunny, suddenly the bunny SOUNDED. Have you guys ever heard of a bunny sound? It's a short scream just like a beep.
My brother and I expected a Nobel prize for this discovery but we still cannot find a learned journal to post our paper.