my theory is, our spirit or lifeforce or whatever it is, is locked inside us, and when we die it is released, the door opens. when they do those experiments,the door becomes unlocked,hence the nde, or obe. i believe this because ive had a obe which actually seemed like a nde. i wasnt dying at the time hopefully.i was in bed, and fully aware what was happening to me, so why did i have an obe? why did my brain unlock? i dunno! i wasnt being spun round in one of those astronaught chairs, or have electrodes put on me, i was just knackered from a days graft..so why did i float outa my bod and see the white light, ive been buzzing ever since, im 100% not religious. even after that.