The longest I've ever been awake was about 72 hours, with a day or two of getting sleep in no more than 4 hour chunks before that. I would hear people calling/ saying my name when no one had. I repeatedly saw large, black spiders descending from black web. I would see what I think was a woman, all shadow, standing on the stairs from the corner of my eye, but if I tried to look directly she'd not be there. I heard doors closing that were never opened, and a sound that sounded like keys jangling on a key ring.