Some special habits of Vietnamese people include:

1. Drinking tea: Vietnamese people have a strong tea-drinking culture. They often drink tea throughout the day, not only as a way to quench their thirst but also as a social activity. It is common to see people sitting in small tea shops or on street corners, enjoying a cup of tea while chatting with friends or playing chess.

2. Eating street food: Street food is an integral part of Vietnamese cuisine, and locals have a habit of eating out frequently. From early morning until late at night, the streets of Vietnam are filled with food vendors selling a variety of delicious dishes. Tourists might be surprised by the sheer number of food stalls and the vibrant street food scene.

3. Wearing face masks: It is common to see Vietnamese people wearing face masks, especially in big cities like Hanoi and Ho Chi Minh City. This habit is not only due to pollution but also as a way to protect themselves from germs and diseases. Tourists might find it surprising to see so many people wearing face masks, but it is a common practice in Vietnam.

4. Honking horns: Vietnamese people have a habit of honking their horns while driving. It is not uncommon to hear constant honking on the streets, especially in busy cities. This habit might surprise tourists, as it can be quite noisy and chaotic compared to traffic norms in their home countries.

The habits of people in Vietnam can surprise tourists in several ways:

1. Street food culture: The vibrant street food scene in Vietnam can be overwhelming for tourists who are used to eating in restaurants or cafes. The variety of dishes, the bustling atmosphere, and the unique flavors can be a delightful surprise for tourists.

2. Tea-drinking culture: Vietnamese people's love for tea and the social aspect of tea-drinking can be surprising for tourists. It is not just about the beverage itself but also about the experience of sitting down, relaxing, and enjoying a cup of tea with friends or strangers.

3. Face mask usage: Tourists might be surprised to see so many people wearing face masks in Vietnam. This habit reflects the importance Vietnamese people place on personal hygiene and health. It can be a cultural shock for tourists who come from countries where face masks are not commonly worn.

4. Traffic habits: The chaotic traffic and constant honking of horns in Vietnam can be a surprising experience for tourists. The lack of strict traffic rules and the seemingly disorganized flow of vehicles might be overwhelming for those accustomed to more regulated traffic systems.

Overall, the habits of Vietnamese people can surprise tourists with their unique cultural practices, culinary traditions, and different approaches to personal hygiene and traffic etiquette. These habits contribute to the rich and diverse cultural tapestry of Vietnam, making it an intriguing destination for travelers.