Always be on alert, because there are some things that are so easy to miss. Throughout life, people learn interesting, small facts that are actually really helpful, and sometimes life-saving depending on the situation. Not everyone knows what to listen for, but luckily, there are people who have the acute knowledge to make others aware of things to pay attention to, and they share this knowledge online.

Someone on Reddit asked users what is a sound that people should recognize as immediate danger, and people had answers. Some of these are obvious things that everyone should know, but might not put a lot of weight on. Others are more distinct knowledge that only someone with experience might know.

Read through these answers and pay attention to them, one of them might save someone's life someday. These are just some sounds and noises that everyone should recognize as immediate or potential danger.