Flying an airplane is actually a skilled trade, just like driving, no matter how gifted you are, you can't possibly pilot an aircraft right after passing a written test.
Yang Yi didn't even know where the control stick on the airplane was, so how could he possibly fly an airplane?
Regardless, boarding an aircraft and flying it for the first time is too premature, so any person with normal intelligence would understand that Yang Yi was going to be in for a tough time.
As long as he didn't vomit inside the aircraft it would be a victory, but if he threw up in the sky, especially inside his helmet, that spectacle would be too beautiful to behold, and Yang Yi couldn't even bear to imagine it.
But no matter what, Yang Yi still had to muster his courage and board the plane.