IH8kidz: If you are using a wedge(not PW), the only thing that works is a standard full shot. You can take some off, but must be a full shot.
Not so, IH8! Full or Punch shots will both work from on the green. Similar rule of thumb for distance (2x needed) although the punch roll-out will be different than a full shot. What won't work from on the green are Chips, Pitches, or Flop shots.