Stalling What happens when you point too high. Boat is heading too close into the wind, so that you lose boatspeed and wind starts to luff the sail. SuperVang Technique used to tighten the vang beyond the tension that would normally be achieved by two-blocking the mainsheet. Not related to SuperDave or Superman. Strips of plastic ribbon affixed to sail to indicate airflow direction over the sail.
Some sailors use the sound to judge sail trim.
Not to be confused with French Ticklers, which I suppose are used by French Laser sailors. Pulley system for holding down boom. Prevents boom from rising up as you let out mainsheet - this would ruin shape of the sail. Applying lots of tension to the Vang so that boom is very low, makes a very flat sail. Good for strong winds on the beat.