My husband awoke from the dream with the sharp pains of indigestion. Personally, I think the sharp pains initiated the image of the metal spikes. This comment requires a bit of explanation. For astral projectors, their traveling vehicle is an astral body similar to the physical version. Remote viewers are more apt to travel without a body, as a spark of consciousness.
Shamans hitch a ride on another body, whether it be fish or fowl.
They travel empathetically, as the other body. They become one with the bird or beast. The common idea is that consciousness travels beyond the physical body. My husband recognized that the foreign car winding its way through the corridors of his dream was equivalent to the foreign matter winding its way through his intestinal track. His consciousness was an empathic spark of awareness taking part in the events driving through the innards of his body.