As far as many of the things he talks about, these mostly relate to a more natural dying process. A death rattle, the loss of hunger, the state of intense relaxation and confusion, those are all parts of a natural dying process. Most suicide methods are going to cause an entirely different process of dying. Hanging, jumping, gun shots, all of the faster methods will obviously skip several steps. You're there, then you're gone. Slower methods such as overdose or SN will cause their own set of dying symptoms related to the signs of whatever substance you are overdosing on. The death rattle is not going to be present in a suicide death unless you somehow manage to pull off dehydration, which is nearly impossible to do. Several methods could potentially lead to other abnormal breathing patterns, most notably agonal breathing, but similar to the death rattle, you most likely won't be conscious when you reach that state depending on the method. Ultimately it's hard to know what will happen as far as out of body experiences or memory recall until you're actually going, but the physiological process will be unique to each method.
