The ambulance company I used to work for had a "haunted" ambulance, rig 12. A lot of EMTs had their own stories about it, mostly involving weird noises coming from the patient compartment or the electronics going haywire, but I never put much stock in paranormal stuff. My personal experience was when my partner and I were in rig 12 and posted in a rural community at 3am, so it was pitch dark and dead quiet. We were both dozing up in the cab, I was in the driver seat and she was in the passenger seat. I woke up to a muffled voice and initially thought my partner was trying to talk to me. I told her I was trying to sleep and rolled over toward the window and closed my eyes again. Then I distinctly heard heard a male voice say, "Oh my god, am I dying?" followed by what sounded like heavy breathing for a couple seconds then complete silence. My partner and I both sat straight up and looked back into the patient compartment where it sounded like it came from. It was quiet for a couple seconds, then we heard the click of an oxygen bottle regulator and hissing like it was leaking. I turned on the compartment lights and we both piled out of the rig. Initially I thought a transient may have climbed in the back while we were asleep and was messing with stuff, so we walked around to the back of the rig and opened up the back doors. No one was back there. I checked both oxygen bottles, neither were opened. Needless to say, we kept the lights on in the rig and didn't sleep much after that. I don't know if I believe in hauntings, but I guess it would make sense for an ambulance to be haunted. Rig 12 had been in service with various agencies for over a decade, and had probably seen its fair share of patients die in the back. I rode in it a couple shifts after that, but nothing else strange happened that I recall.