The notorious "spun crank hub" has become a fairly common repair for the S55 engine and is now a prevalent preventative maintenance item for F80 M3 / F82 M4 owners to prevent a potentially catastrophic failure from occurring. Checkout some of the results from 2x different F80 M3's that StudioRSR repaired.
To briefly explain what happens when your crankhub spins, we go over some of the basics of how the factory crankhub was designed and what the failure means in the video below by "Simply Car Things" (explanation at 1:40)