The dream started with me on a bicycle; it was rusted and falling to pieces, and I was trying to ride it along the side of the highway. It was night, and I could feel something behind me chasing me; when the bike broke down I started running, and could see the beginnings of a forest ahead of me. Just as I was about to reach the forest, I tripped over a rock and went head-first into the pavement.

When I sat up, I found myself in a zoo (only I was in a cage). There was a large green snake dangling from a branch above me, and I was worried that it would bite. A person dressed in a dark robe came to the door of the cage and opened it, letting me out. They said "the key was in the shoebox" and that I should "get moving."

I started walking through the zoo, and found that none of the usual animals were there; it was comprised entirely of reptiles. As I went through the front gate, I noticed that the sun had started to rise.

Leaving through the gate I noticed a house with a broken front door over a nearby hill; when I stepped through the doorway I noticed that everything was covered in a thick layer of dust. As I walked further into the house, the dream ended.

Does anyone have any ideas about what it could mean?