Try doing an all-flaps up approach and landing in a 737 with ARM mode actuated and manual flying. Nearing the threshold at VREF +5 which is around 190 knots in that configuration, and especially at the flare, the throttles come alive and unless you hold them hard back they will apply thrust and you will float to buggery. Sticking to the recommended Boeing procedure covers your back side and is perfectly safe and keeps the lawyers at bay.
