<unk> refers to a set of brief unconscious behaviors. These typically last for several seconds to minutes or sometimes longer, a time during which the subject is unaware of his/her actions. This type of automatic behaviour often occurs in certain types of epilepsy, such as complex partial seizures in those with temporal lobe epilepsy, or as a side effect of certain medications, such as zolpidem.
Automatism 
Listener fatigue
Automatic behavior
Alexithymia
Morbid love
Bullying
Emotional detachment
Fear of trains