Board Thread:Manga/@comment-27219819-20190709211251/@comment-36306777-20190716133458

Turi123456 wrote:

A. to do the same thing as Reiner not going to save Eren: Reiner was a Titan back then plus he doesn't lose all of his head so even if Eren can do the same thing he can't grow up a new head.

When we say "the same thing Reiner did" we refer to the first time, when he got his nape sliced by Levi with his sword before turning into a titan.