It's not so much what they saw. It's what they heard and felt as well. A lot of the saved said they could hear beautiful music or singing. Some said they were seeing beautiful, bright, and vibrant colors.
The unsaved was bad. The majority of these were screaming and kicking right before they died as they had been not moving at all before.
They would scream he's on my bed, get him away from me. Some screamed there were snakes or spiders all over their body. They also were screaming that they were on fire as well, such as feet or other parts of their body.
I know that when I was little, my grandfather had told me of a man that he knew that started screaming that his feet and legs were on fire and was screaming don't let him get me and died right there on the spot. He said he had cancer and had been bedridden for a while.