Final answer:
Narcolepsy is the disorder when someone falls asleep suddenly while awake, brought on by strong emotions.
Step-by-step explanation:
The disorder a student is asking about is Narcolepsy. Narcolepsy is a sleep disorder characterized by an irresistible urge to fall asleep during waking hours. It can cause sudden and uncontrollable episodes of sleepiness, even during activities like working or driving. Narcolepsy is often triggered by strong emotions or stressful situations. These episodes can last from a minute or two to half an hour. Treatment options for narcolepsy may include medication, lifestyle changes, and counseling to manage the symptoms.