I enter a perfectly normal airplane at a perfectly normal airport and I sit down in a perfectly normal seat. However, so long as I am sitting in this seat, the plane will not start. I'm not in the pilots or co-pilot's seat, and as I am a perfectly normal man, I could definitely be in this seat, but apparently not today. I'm not in an emergency aisle Everyone is on board, including the flight attendants, passengers, pilot, and co-pilot. There is nothing obstructing the plane and the runway. But as long as I sit in this particular seat, the plane will not start.
Why won't the plane start?
Additionally, the plane is cleared for take off. There is nothing wrong with anything outside of the plane, or with the plane itself. Everyone who is supposed to be in the plane is inside the plane, and no one else is. I'm not a child, and I'm in perfectly good health. The pilot/crew are free to get to wherever they want, and the airline has no seat restrictions. There is no one else in my seat. The airline/airport is not preventing any takeoff.
This is my first ever puzzle. At this stage, there may be multiple solutions (although, there is only one intended one). The puzzle was originally designed so that the puzzle-solver could ask yes-or-no questions. I tried to answer the most common guesses I had in the problem, but if you have any yes-or-no questions, feel free to comment.
I will answer in-post due to account restrictions. nvm, I can answer your questions :D