I have a few from GundamW and Tenchi Muyo.  The
one below is my (new) favorite:

On video, it looks like 2 separate sequences, but
it really is one sequence with some flashback
sequences thrown in the middle.  'Both' sequences
share the same background and the 'second' part
continues the numbering scheme from the 'first'
part.  I just wish the teapot layer wasn't stuck.
 (the moon shadow highlights disappear in the
second part on video)