It can't be... They were having a tense dinner in the middle of the wood, listening the rumbling... How could Reiner tell him all of a sudden how Marco, his best friend who died years ago?

He punched Reiner and kicked Gabi accidentally since the teen got in the way....

He left to the inside the woods to clear his mind and cry alone, it was too overwhelming. He spent some time alone until someone snaped him to reality again.