What is the worst experience you had in an airplane?

The worst experience I've had on an airplane was on a flight I boarded from St. Martin to Common Wealth of Dominica. I think the airplane was faulty. The noise from the aircraft was so much that we couldn't hear the pilots, the airplane was shaking all through the flight as if the plane was about to crash. I was scared to death.
The air hostesses were not nice at all. The didn't attend to most of our needs. We were not offered even water throughout the flight.

To cap it all, my luggage did not arrive with me in Dominica. I visited the airport 4 times before I got 1 out of 3 bags, the other bags were never found. I pray I never experience such again.