We were told NO electronics, watchs, phones, thumbdrives, ANTHING. Anyways, NCOIC at briefing heard it, stopped the powerpoint and asked whosever phone it was to pass it down the aisle. NCOIC went down the row, got the phone and walked back up to the podium. Under the podium, he somehow produced a huge ball peen hammer, put the Major's cell phone on the credentials table and completely obliterated his cell phone in front of all....and then calmly returned to his briefing.
After the break, never saw the good Major again, even at PT or on base.
RUMINT is that he went to Benning for Infantry AOC (now called Maneuver course or something).
Cool.... the NCO sent a clear message to all in the room.