A Separate Piece Quote Significance Chpt 2

Quote
"We reminded them what peace was like, of lives which were not bound up with destruction." (24)

Significance
One reason I chose this quote is because it illudes to the title. It talks of "A Separate Peace" that only the younger students could have. Only they could have that last summer before they were apt to be sent across oceans, to fight for their and their country's freedom. They did not have to worry, they just basked in the summer's glow, but with a certain savoring. I believe Mr. George's analogy was something like "You know those days when you look up in the sky and see a perfect patch of blue sky, then you look to the south and ominous clouds? When that happens, you're gonna play in the sunshine as long as you can because you know the rest of the day is going to be crappy. That's what life is like for these kids. The teachers are gonna let them play in the sunshine before the clouds are overhead."

Question
In the end, when Gene almost falls of the branch, could that be a foreshadow to something bad happening? Will it be to him of Finny, or will it affect both?