Before I get into things, there are small spoilers in this animation, so watchers beware, if you've been out of the loop with Attack on Titan you should probably look into that, it's honestly the best thing to happen to anime in years.
Like any quality series, Attack on Titan has spawned a massive fanbase over the past few months, and with every fanbase comes amazing fanart, but this is on a whole different level. Animators Arc & Mairi have put together this fantastic animation, which cleans up the original intro sequence. That's right, you can start laughing now, it was a really great pun.
With the series just passing it's halfway point for the season, I'm interested to see what else the Attack on Titan community releases because it's going to take a lot to live up to this.