The first impression plays jokes

Option 3: Have you ever formed a first impression of someone that eventually proved to be completely wrong? Do you know of an occasion when someone formed an impression of you that was completely wrong?

After reading the article " The first four minutes", I strongly agree with the author of saying that whether two people can become friends or not at least depend on the first four minutes of the first meet. However, the first impression often leads people to an inverse way of judging a person.
Five years has passed, it is extremely hard to forget a person that exists in my memory all along. Because of him, i never use the first impression as the only evidence to judge a stranger. When I was in the middle school, i met a person which sit in front of me. He rarely went to the classes, whereas to my surprised, he always got a great score in the test. Whenever i talked to him, he always answered with few words. In short, the first impression of him make me to hate him. I always played some jokes on him in order to make him embarrassed.
Nevertheless, one day, the latest impression marked an about-face from his first one. On my way to the school, I accidentally saw him helping an old person to do the housework. That's the reason why he always was absent. I was so ashamed of my past behavior. Therefore, I always help him to take care of that old person, and he became one of my best friends.
In general, people always use the first impression to judge a person. However, the first impression sometimes plays jokes on people. The first impression can be regarded as one standard, but not a mere one.