lomapaseo nailed it
>>> Like a downhill skier the blade tip follows the line of lowest friction which skate it forward of the plane of rotation.
Yes, exactly. Perfect analogy succinctly explaining the physics.
>>> The secondary events immediately following the loss of the blade now become of primary importance to resolve.
Yup. Given the possible consequences, it appears that better containment of an FBO is required forward of the containment ring.
Also, another chapeau to the crew, ATC and the pax who immediately stepped forward to assist. Cool, collected and competent, across the board. Gold stars to everyone.