With being 30 minutes from destination I’ll bet the seatbelt light was on. Even if it wasn’t except for flight attendants doing their job there is no reason for passengers at their seats not to have their seat belts on. Hopefully any flight attendants who may have been injured along with any belted pax who may have been struck by unbelted persons will recover quickly. As far as any injuries to any unbelted passengers, you got what you deserved. I know some may feel my last sentence may be cruel, but I get tired of seeing so many ignoring the seatbelt on light during times the pilots think it is needed when I am airlining, knowing it is for everyone’s safety.