Often, if one person yawns, this may cause another person to "empathetically" yawn. Domestic dogs have shown the ability to yawn contagiously in response to human yawns. The boy's yawn became a smile in early 1929. A loud yawn may even lead to penalties for contempt of court. Similarly to humans, dogs yawn in an attempt to awaken. Dogs, and occasionally cats, often yawn after seeing people yawn and when they feel uncertain. Adaptors are more subtle such as a yawn or clenching fists in anger. The yawn reflex has long been observed to be contagious. Temple for her part would either yawn or scratch her face. During a yawn the tensor tympani muscle in the middle ear contracts. The story and treatment is a long yawn. This suggests that emotional proximity rather than spatial proximity is an indicator of yawn contagion. The family name is pronounced "yawn", not "yee-on". Fish can also yawn, and they increase this behavior due to lack of oxygen. Other notable rock formations in the area include Hippos Yawn and The Humps.