If you watch Death Note backwards, it's about a young detective who erases names from a notebook in order to bring people back to life. The show ends with the notebook magically going up to the skies and the young man having to re-take highschool.
If watched backward Tengen Toppa Gurren Lagann is about the defeat of a grand army and their subsequent retreat to a small planet where they hide underground after being harassed by the strange local fauna.
