4. What if I have to go when the seat belt sign is on?
Well, that is illegal. Even if you have an emergency, passengers are advised not to get up during takeoffs or landings, while the plane is taxiing on the runway, or there is a lot of turbulence. Don’t get up if the flight attendants are seated. Some attendants may not stop you if they can see you are desperate, but if the conditions are unsafe, they may ask you to sit down. Not obeying a flight attendant is a serious crime and you don’t want to get booted from the plane.