Analyze my reoccurring dream?

I keep having a dream where I am at a park or zoo with some friends and I fall through a man hole type thing that is open on the path way. I fall into what looks like an old animal cage for the zoo. I try to get up but I can't because I am stuck to a decaying body that is lying next to me. I can't seem to come unattached and no one is around to help me. The harder I pull, the more stuck I become.