McVries had said from early on in the book that eventually he would just sit down when he was too tired. I didn't think he would actually do this, especially when there was only three people left in the walk. Some of the other guys went on until they were crawling on the ground and they just couldn't move anymore, which is what I thought McVries would have done. Instead, he just said, "No, Ray, its time to sit down," and then he did (367).
When he did sit down, and after the soldiers were ready to shoot him, Garraty said "No! Me! Me! Shoot Me!" (367). This surprised me because McVries is somebody that he's only known for five days. Garraty had walked very far (they were approaching Boston at this time) and he wanted to win really badly, so it shows how much he liked McVries that he was willing to give his life for him. I know McVries had saved Garraty's life twice already, and Garraty was probably trying to return the favor, but it still was a really big act on Garraty's part.
Here's a drawing somebody made of the scene:

