I am always amused by some of the small talk people come up with in short casual situations, such as riding in an elevator, in the check out line, etc. Sometimes its quite humorous and if you're at work, it breaks up the day, especially if you are having a bad/long day.
This brings me to the comment I just heard. I was walking toward the door to the building that I work in and there was a lady on the other side. I could tell that she was trying to push open the door. The problem was, she needed to pull. After she realized her mistake and opened the door, I jokingly commented "pull". She said "Yeah, the OTHER pull".
At least it made ME laugh!