He wants to tell this stranger no. The he won't go. He wants to dig in his heels and demand that the stranger just send him back. Put him back where he was. But 76 is being so insistent and there's something so weirdly nostalgic about how easily he seems to handle Reinhardt's stubbornness. Like he's had to deal with the Crusader's pigheadedness more than once.

So when 76 goes to leave, Reinhardt follows. He follows because he has to. Standing in that room gives him no answers and doesn't get him any closer to getting back to the people who needed his help. If following this man gets him to that faster, he will. But he no longer trusts him. Reinhardt shifts so that when they walk, 76 is on his sighted side. He's sacrificing his safety from the unknown to keep an eye on the smaller man.

The hall looks so damn strange. His frown deepens as he takes it all in. "Where the hell am I?"