> Passengers reported they were told one of the flight attendants had suffered a broken rib, another person a fractured leg. The trolleys had been lifted and impacted the cabin ceiling and fell to the floor several times, passengers not wearing their seat belts also hit the cabin ceiling. The crew announced they had lost more than 1000 feet of altitude, they hadn't seen such severe turbulence ever before.

https://avherald.com/h?article=52b0a50c&opt=0

My mom worked on airplanes for 35 years—-She always told us this.

She was once flung to the ceiling (and then back to the floor) while trying to get back to her seat.

I do, I tighten it for take off/landing and loosen it a little once we are at cruise - it's not even noticeable but it's better than impacting the ceiling.

This is so important I put mine on, and avoid taking it off until I'm on the ground again.

Yeah, I've heard enough stories of people getting hurt on passenger planes from unexpected turbulence that I always have the seatbelt on during the entirety of any flight. Could make the difference between getting a severe injury or not!