Disturbing moment during a junior hockey game ... a player sucker-punched an official in the face, and the player has now been hit with a lifetime ban.
It all went down in the United States Premier Hockey League -- a developmental league for amateurs -- when a member of the South Shore Kings got frustrated with one of the refs.
Check out the clip, the official appears ticked off by something the player did and motions to send him to the penalty box.
That's when things went south .