First Culture shock in US

I always had the perception in mind that I would have a culture shock if I went to country besides mine, but I guess it’s not only me, it’s also for the people around me, their culture and their social background. my way here to the United States I kept thinking that I would differ from the people around here, and that it would be hard for me to adjust because of the way of living, the culture, the social background, and the way of judging.
When I first reached Lamoni, Iowa and was waiting for the international department staff from the University to come pick me, I had strange feeling. It was strange because I had a completely different picture in mind of what the place would be like, but instead I saw people dressed in blue pants and white shirt, riding on horse wagon and as they passed by me they nodded their head and had a smile on their face. It seemed funny to me because United States is the leading county in technology and fashion and people were still riding on horse wagon and wore simple plain dress. Later did I know that they were the Amish people and where best known for simple living, plain dress, and resting modern convenience, but at first I had mixed gestures regarding their nodding and wondered on whether they were smiling on the way I was dressed up or were they categorizing me because I seemed different I did not know what to do and just stared on to them because back home sometimes it may be considered offensive to others, as it may also be considered as looking down on to the person or even judging the person. Overall I would like to say that it was a totally new introduction of the United states to me.