Dreams of death are freaky... Never figured out what they meant and thankfully I've only had a couple involving myself dying.
Once, shortly after my best friend was killed, I dreamt that I was at his house. I knew I was going to die, so I went about telling everyone whatever it was I had to say to them. Then, about an hour before 'my time', I laid down for a nap. I was awakened by my friend, who was driving the old car we used to run around in, honking the horn and calling for me to come on. Needless to say, I woke up for real and was really freaked for a few minutes...
The other dream I had was that I had already died. The viewing was held in the trailer I grew up in. There is a certain song I want played at my funeral but my parents couldn't find it. I got up out of the casket, went into my room and got the tape, put it in the tape player and sat in a chair looking at my coffin while the song played. Now that one I never figured out...
As for Death carrying a shotgun, I suppose swiping all those who have gone on before with the scythe finally blew out his shoulder...
KDogg