The tailslide is flown by flying a vertical line until the airplane's upward motion stops and the force of gravity begins to slide the airplane backwards.
(The tailslide; is flown; ) (the airplane's upward motion; stops; ) (the force of gravity; begins; ) (the force of gravity; to slide; the airplane; backwards)
The tailslide the airplane's upward motion the force of gravity the force of gravity
is flown stops begins to slide
the airplane backwards