Dream interpretation?

I had a vivid nightmare last night where it was like a doentary I was watching where a man bent another man over, had a bucket on the floor under his head and was yelling at the man saying "I am a man of God!" over and over then he chopped his head off with a hatchet...the head went into the bucket. Then continued doentary style it told how this murderer stayed in the house with the dead body that no one ever discovered...for many years, and bugs like flies and maggots were all in the house and the murderer had sores allover his body from being bitten by bugs and he wouldn't go to the doctor but lived with all these open itching oozing sores...then the doentary told how the man eventually died of some disease...I woke up with a gasp...totally horrified! Does anyone out there do dream ysis at all??? It really disturbed me alot.