Randy has several important points to make when he speaks with Ponyboy at the Tasty Freeze. First, he tells Pony that he will not be participating in the rumble that night. He knows that winning or losing the rumble won't really matter.
"Greasers will still be greasers and Socs will still be Socs."
People get hurt and sometimes even die in rumbles, but for the greasers, things will always be the same. Even if the greasers win, Randy tells Pony, they'll still lose. Greasers will still be "at the bottom," and Socs will "still be the lucky ones with all the breaks." According to Randy, the people in the middle are really the "lucky stiffs."
Pony tells that Randy that he would have gone into the burning building and saved the kids, just like he did. Pony realizes that Randy wasn't really a Soc,
"he's just a guy."