There are individuals that "die" for a few moments. Some for 40 seconds, some for a minute. They all have a few things in common with their "death" experiences. They all see a tunnel with a light at the end, which is explained by the back of the head in response to death. What cannot be explained is the overwhelming emotions, view of the entire lives, and looking down at their limp body.
They view each moment of their life. And for those who will continue on living, they see their future children. When they look at their form, they can view the entire room they are in. When back in their body and talking, they can tell exactly what doctors, nurses, family members, anyone in the area was doing while they were "dead".