"How do you figure Pooh?"
This part has always bugged me a little. Marty is wise enough beyond her years to quote Shakespeare and Lou Reed, but she doesn't see how her relationship with Willie can be compared to Winnie the Pooh and Christopher Robin? A story that a kid her age would almost certainly be familiar with? I love this film (although like others, I felt Marty was just a little too precocious to be realistic), but I found that to be a little bogus. Someone as insightful as Marty would most likely have gotten the Pooh reference without it being explained to her.
Saying "I apologize" is the same as saying "I'm sorry." Except at a funeral.