I'm going to give this a shot.
I think I have had several NDE's, but I know I've had one for sure.
I'm not sure when this happened, as like I've said I think I've had more than one. All I know is I ended up in a place of complete nothingness. There was no thought, no feeling, no sight. There were no other beings, and I was completely alone. I was only aware of my presence and a floating feeling in the darkness. As I floated, I started feeling the consciousness of myself. I started to get very scared and wanted out. Basically, I was thinking if this is death I want no part of it.
Recently, I also had an experience, in which I came close to death. Although, I didn't go anywhere, I was aware of my body leaving. This time I fought not to die, and somehow I didn't. However, I was given a stern warning that this would be the last time I would be permitted to come back.
Although all of my experiences have been drug induced, usually at the hands of my own stupidity, I know these experiences were real, and that the warning I was given needs to be listened to. You only get so many chances to get things right, and the last one was the final chance.