What cultural faux pas should I try to avoid making in Arizona?

We asked people in Arizona if they could share any humorous cultural blunders they commited. For new expats, keep in mind that these incidents are an inevitable part of expat life. Learning to laugh about them is the key!...

Other Questions:

•  What do I need to know before retiring in Arizona?
•  How do I meet people in Arizona?
•  What is life like in Arizona?
•  Is there a lot of crime in Arizona?
•  Is there a lot of diversity? Are people in Arizona accepting of differences?
•  What are the schools in Arizona like?
•  Is the cost of living in Arizona high?
•  What advice do you have for expats having a baby in Arizona?
•  What are healthcare services like in Arizona?
•  Is the cost of living in Arizona high?
•  What type of recreational facilities are in Arizona?
•  What is the weather like in Arizona?
•  Are there good restaurants in Arizona?
•  Where will I buy groceries and do other shopping in Arizona?
•  What are the visa & residency requirements in Arizona?
•  Are healthcare and health insurance expensive in Arizona?
•  What do I need to know when buying property in Arizona?
•  Are foreigners allowed to own property in Arizona?
•  What appliances are typically included in a rental?