Culture shock is real, and sometimes a very small detail is enough to make you realize that the things you take for granted are definitely not standard. It could be as small as finding out milk is sold in bags, or as big as realizing that traffic laws are more of a suggestion than anything else. That said, non-Americans get some serious culture shocks when they get to the States, and some would be shocked to realized that there are some Western foods that are weird to visitors.
