What are examples of foreshadowing in of mice and men chapter 4?

One example of foreshadowing in Chapter 4 of "Of Mice and Men" is when Crooks, the stable hand, tells Lennie about how lonely he is and how life on the ranch can be tough for a black man. This foreshadows the isolation and discrimination that George and Lennie will face later in the story. Another example is when Curley's wife talks about her desire for attention and companionship, hinting at the trouble and conflict her character will cause in the future.