Board Thread:Anime/@comment-5774380-20170506153452/@comment-28214092-20170507113958

I have a doubt though.when Reiner is about to transform mikasa comes puts a blade through his hand.and then cuts bertholdt's throat. That doesn't count as self injury,cause they never bit themselves and specially bertholdt's who got his throat cut,so how did they transform,they just get sliced by mikasa and then they just transform.we didn't even see them.biting themselves.anyone care to explain???