1. You are yelled at in a foreign language in a foreign country.

2. Remembering enough French from high school to know that the two Frenchmen sitting next to you are talking about you, but not knowing enough French to understand what they're saying.

3. Having to examine a map publicly in a foreign country.

4. When your trip to Paris makes you realize how tasteless the rolls are at your hometown bakery.

5. The difference between the scenes in the travel brochure and your vacations.