Why are the hiccups catchy?

Hiccups can be considered "catchy" because they often occur in response to certain stimuli, such as eating too quickly, consuming Carbonated Beverages, or experiencing sudden excitement or stress. When one person has hiccups, it may prompt laughter or mimicry from others, creating a social contagion effect. Additionally, the involuntary nature of hiccups can make them seem amusing or entertaining, encouraging others to join in the experience.