Ever wondered what that mysterious "ding" sound is when you're flying? It’s not as spooky as you might think — it’s actually a signal from the plane’s cabin crew or the cockpit, often alerting passengers to seatbelt signs or other important updates. But there’s a lot more cool stuff about planes you might not know! For example, did you know that modern jets can fly for hours without needing to refuel? Also, airplanes are built with amazing technology to prevent lightning strikes from causing any harm. And here’s a fun fact: pilots actually get to fly through the same airspace as UFOs — some sightings are just high-speed military planes! So next time you hear that ding, just remember, it's probably nothing but a sign of a safe flight.