What happens 'only in Switzerland'?

Once a year on the first Wednesday in February, Switzerland tests its national network of emergency alert sirens. It's something quite unique that so many (7,200) are tested all at once, and it got us wondering: what else happens in Switzerland that seems to you to be unique or highly unusual? We asked our Facebook and Twitter fans to give us their suggestions for other unique aspects of Swiss culture. 1. An annual nationwide test of 7,200 emergency sirens There are thousands of sirens in Switzerland, mostly placed on rooftops, and they're all tested together at 1.30pm in early February. Other countries such as Sweden (4,600 sirens) and the Netherlands (3,800 sirens) for example, also carry out tests, but they don't have as many as the Swiss. There are also two different types of alarm in Switzerland. The general alert, for a possible threat to the population: The water alert, for people who live below dams: 2. Swiss gun ...