The only thing that was bang-bang was Church and the ball arriving at Gronk at virtually the same time. Turning at the last second was self-preservation on Church's part. The replay I posted does not do it justice.
Try this one:
Richard Sherman defends Barry Church's hit that left Gronk with concussion
Its football not basketball, its easy for you to say playing monday morning qb and not covering Gronk you gotta be physical with him its the nature of the sport.