Is there a reason for the sudden change in style in episode 11?


The animation throughout the first 10 episodes seemed pretty consistent to me.

[![Image from episode
8](https://i.stack.imgur.com/uS7ejm.jpg)](https://i.stack.imgur.com/uS7ej.jpg)
[![Image from episode
10](https://i.stack.imgur.com/3w5Zxm.jpg)](https://i.stack.imgur.com/3w5Zx.jpg)

However, episode 11's style had nothing to do with the first 10 episodes
(though it was probably consistent throughout the episode):

[![Image from episode
11](https://i.stack.imgur.com/H3qp2m.jpg)](https://i.stack.imgur.com/H3qp2.jpg)
[![Image from episode
11](https://i.stack.imgur.com/uY49Hm.jpg)](https://i.stack.imgur.com/uY49H.jpg)

Since this show is filled with references to other anime, it occurred to me
that the change in style could be a reference in itself. If so, what was it a
reference to?  
If not, why the sudden change in style? Was it due to budget or something
similar, or did they just decide to go on a different direction for some
random reason?




This episode was [done
entirely](http://www.animenewsnetwork.com/encyclopedia/anime.php?id=16247) by
one person, [Itsuki
Imazaki](http://myanimelist.net/people/30623/Imazaki_Itsuki), whose style you
might recognize from [Ai Mai
Mi](http://myanimelist.net/anime/16169/Ai_Mai_Mi).

Everything involves storyboard, [mise-en-
scene](http://en.wikipedia.org/wiki/Mise_en_sc%C3%A8ne), directing, and key
animation.

