I've only hallucinated once. I had been awake for three days straight and was reading a book. Suddenly, all the print liquified into a shimmering pool and then flowed off the pages into the floor, leaving the pages blank. I'm extremely stubborn. I thought to myself, my mind is telling me you need to sleep, but I'm not going to listen. I closed the book, looked around the room for awhile, then opened the book. Still blank. I tried this a number of times until I said the hell with this and went to bed. I slept 18 hours, the longest I've ever slept.