I recently put in this pick off move at 2nd base that I came up with. My high school team used it 3 times so far and we are 1 for 3 with it. One of the other times was very close, could have went either way. Here's how it works:
It is done at 2nd base. Shortstop breaks over near the bag and does a couple of glove pats (the usual). As he retreats, he comes in front of the runner. At this point he stops dead and turns face to face with the runner so they catch eyes. At this time the 2nd baseman goes to the bag, the catcher drops his mitt as a signal for the pitcher to turn and throw.
All three times we used this move, the opposing coach came out questioning the umpire about obstruction. All three times they were told the same thing, " The shortstop did not impede the runner from getting back to 2nd base. He was not in the base-path but instead, in front of him. If this is done with perfect timing, it's almost sure to work. It's only human nature when a guy stop abruptly and stares into your eyes for a split second to stare back for a split second. That's all it takes. Tell me what you think.