This term is used for the art of letting out a fart over a extended period of time. Usually spanning from 1 hour to about 72 hours. Instead of one initial blast, the giver of the installment plan spares his bros and babes the trouble of a nostril attack.
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.