I don't know what is causing it and neither does she, but my sister, who is only 12, is hallucinating at random. She says they have been going on for about 3 - 5 months and they sometimes happen daily, though not always. They are extremely brief, the longest ones usually only last up to 15 seconds. She usually sees a man in a top hat dressed in all black with a cruel smile and sometimes dark laughter. She sometimes sees people burning in fires, and she has never witnessed a fire. Other things include people hanging themselves and just hearing people scream. She has no clue why and I asked her if she saw anything shocking and she said no. I also asked her if the amount of stress recently has been considerable and she said no as well. We told mom about it and she said she will call a doc ASAP. I'm only 14 going on 15 and I am very scared and worried - what should I do? what could this be? please help!