Exactly. I want to see heads roll on this. And they should.
That would be indicative of a poorly trained executioner. A good hangman can accurately calculate the weight, mass, distance and perhaps wind speed to ensure a nice, clean drop & snap.
It would really be quite unpleasant to experience a head being ripped off and spewing blood all over the place. We should desire a clean and orderly process for the public executions to be held on the national Mall.