If the plane is still on the ground and a passenger says they are too sick to fly, the plane goes back to the gate to let them get off the plane. That's normal.

If the plane is still on the ground and a passenger says they are too sick to fly, the plane goes back to the gate to let them get off the plane. That's normal. A passenger said they were too sick to fly, so the plane went back to the gate. When it reached the gate, the passenger changed their story and things got more complicated.