I've used the 'running take off' technique a few times in the AEW MKII Seakings of 849 to get off the deck of the (now old) carriers. We would wait for a clear deck, line up right at the back, perform a 'running' take off and flop off the left hand side of the deck just prior to the ramp, around '2' spot. The idea was to slightly over pitch the blades for the initial 'flop' as to clear the deck then use the height to accelerate into the ground cushion and translational lift.
The 'Bag' often required a fair bit of help off the deck in hot and humid conditions when the fuel load necessitated a long fighter controller sortie.
Fun times!