The Cottagers were visibly deflated by the immediatereply and Huddlestone compounded their misery with a fine fourth, driving into the corner right-footed from the edge of the area.
Carmarthen almost found an immediatereply as Cardiff went to sleep at the back, but Forde was on hand again to frustrate the home side and secure the Bluebirds' passage into the semi-finals.
Newcastle's reply was almost immediate with Gopperth stepping through and the Falcons piled in to win the breakdown for Vickerman to score in the corner.