My dad died of cancer the day I turned 16 after about two weeks in a coma. It was really fast - less than two months between diagnosis and death. He died in the house. (we had a hospice attendant and my mom was very good about seeing to him in those final days).
Anyway, a lot of weird shit happened after he passed, but the one that still freaks me out when I think about it happened about 12 hours before he took to bed for the last time. He was in our living room napping on the couch while my mom was in the kitchen cooking. No one else was home.
Suddenly, he jerked awake and was shouting for my mom in a very loud, agitated voice. Clearly angry with her. "Beverly! Don't do that! Don't EVER do that again!"
She ran into the room, alarmed and asked what he was talking about, and he said, "Don't do that. Don't walk past me like that in that long, black wig."
Sometimes I think he saw death.
Edit: More to the story here