Board Thread:Manga/@comment-26056057-20160509020829/@comment-26932251-20160519103001

Found it! https://www.reddit.com/r/ShingekiNoKyojin/comments/1nc3m5/episode_25_story_about_the_miner_from_the_anime/

So THAT is what that big amount of text during the intermission was. That had really bothered me and rightfully so because I thought I was missing out on something of significance and interest.