When defensive, it emits a shrill wail or squeal. Squealing is usually made when in pain, but bachelors also squeal while play fighting. For small PA systems the sound is readily recognized as a loud squeal or screech. Sometimes a loud noise or high pitched squeal occurs when the brakes are applied. The most well known is a high treble scream or squeal. Other aggressive vocalizations given by females include the "squeal", the "belch", and the "growl". Fawns release a high-pitched squeal, known as a bleat, to call out to their mothers. The adult also rarely emits a low croak, while young frequently squeal. Their call sounds somewhat like a pig's squeal. When flushed out of hiding spots, they may squeal as they escape. Pliny the Elder reported that "elephants are scared by the smallest squeal of the hog". This type of squeal should not negatively affect brake stopping performance. She loses 3, which elicits a high-pitched squeal of excitement from Hannah. A high pitched "squeal" is given only during nest building, and is heard rarely. They also mention that seeing Epona in "Twilight Princess" made them "squeal like fanboys".