Fun fact: It's expressly illegal to move around the cabin when the seatbelt sign is on while taxiing, but not when in the air. Turbulence is probably the leadi

Fun fact: It's expressly illegal to move around the cabin when the seatbelt sign is on while taxiing, but not when in the air. Turbulence is probably the leading cause of injuries and deaths from modern air travel, but taxiing incidents at extremely rare and pretty much never result in injuries.