Yeah, I have. Countless times. The most memorable one took place in the middle of a field. I was walking, just listening to my Zen and minding my own business, when all of a sudden, I felt something penetrate my larynx, and I went down. Somehow, a random ambulance appeared and picked me up. I appeared to be unconscious by the medics, but I could still hear, breathe, and see (I couldn't move or talk, though). When I got to the ER at the hospital, I saw them pull out a hack saw from a treasure chest. By that time, I had passed out in the dream and woken up in real life. As soon as I woke up, I coughed up blood and felt a strange pain in my throat. It was wierd. The pain went away after about 20 minutes, and I was fine for the rest of the day.