When an airplane goes into a tailspin, it spins around and falls from the sky.
Tailspins are very dangerous and scary.
Examples:
The airplane went into a tailspin and crashed.
The pilot tried to stop the tailspin.
The tailspin made everyone on the airplane very scared.
The airplane went into a tailspin, but then it stopped and everyone was okay.
The airplane went into a tailspin and it was very, very scary.
The tailspin was very dangerous and the airplane crashed.