After my wonderful vacation in Bali, I boarded my flight back to London at Soekarno-Hatta Jakarta International Airport.

"Cabin crew, prepare for take off," the pilot announced, and minutes later, we were gaining speed. I was getting ready for the familiar tug of gravity as the plane leaves the ground, but instead, the whole aircraft shuddered as the pilot deployed reverse thrusters. The plane slowed down, came to a stop in the middle of the runway and taxied back to the gate.