John experienced a sudden collapse. He was awake when his friend called him but John could not move. John is suffering from a sleep disorder called what?

John is likely experiencing sleep paralysis, a condition that occurs when a person is awake but unable to move or speak, often accompanied by hallucinations. This phenomenon typically happens during the transition between wakefulness and sleep, leading to a temporary inability to control muscle movement. It can be frightening but is generally harmless and often linked to factors such as stress or irregular sleep patterns.