Refers to
two or more slumbering-state "adventures" in succession, whereby a subsequent dream "pick
ups when da last one
left off" and therefore creates a chronologically-following "episode" to da previous dream.
I suppose dat installment dreams can
indeed be fun sometimes, but if da subject matter of said
nap-time dramas is less than pleasant or comforting, any further "chapters"
may only serve to create additional trauma and exhaustion for da slumberer, and cause him to awake all scared and stressed out.