Originally Posted by queensrider86
it's like a sprocket grind, but you take the foot opposite to the ledge and put it under the seat
Not quite. You grind on the pedal or the sprocket, or both, turn the bike 45-90 degrees to the direction of the ledge, take the hand opposite the ledge off, and use your back (non-grind side) foot to either lift the seat or press on the rear tire, raising the nose of the bike off the ledge.