Culture conflicts can occur anytime you travel, but every once in a while they happen in some truly unexpected ways. From shopping with many coins to (light) up a cigarette outdoors, these are strange and embarrassing travel mistakes (travel) would do their best to avoid. For example, is illegal to feed pigeons on the streets of San Francisco. The city (know) for the Golden Gate Bridge blames the common birds for spreading disease and damaging property. Anyone is caught providing food to San Francisco's pigeons could face a heavy fine. Moreover, citizens (encourage) to report pigeon feeders to the city's police department. For another example, you'd better think twice before you smoke in Singapore. Singapore has (serious) smoking penalty (处罚) in the world. Smoking in public will earn a tough fine. More (surprise), if you're shopping in Canada, don't expect cashiers (accept) many coins as your sole method of payment. According to Canada's Currency Act, stores can legally refuse excessive amounts coins. With pennies, for example, customers' payments may be rejected if they try to use more than 25 0ne-cent coins at a time.