People that have near death experiences come back with information that they couldn't have unless they had actually experienced the event.

For instance they can describe a conversation between their doctor and their spouse that has taken place in a room three doors away from where they are having their heart attack.

People that have been blind from birth can describe the things they have seen while "clinically dead".

People can identify and describe relatives they have never met before or even knew existed.

Heightened electical activity doesn't cut it.