Men may only use their right hand to swing the mallet, while women may use both hands.

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The idea is to pace yourself so slowly through a full golf swing, club in hand, that it takes two to three minutes to complete.

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"When you have people saying thank you (by coming) to your home to swing a hammer and paint a wall, it says something different than shaking your hand and buying you a drink, " said Gallina, 34.

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Mr Romney, on the other hand, is behind in most opinion polls - badly so in the vital swing states - and needs a win.

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After some literal hand-holding with a human to understand the basics of a ping-pong swing, a TUD robot can gradually abstract those motions and return the ball in situations beyond the initial example.

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While the fan will focus on the end result of the pitch or swing, the scout will intently study all aspects of the process such as leakage, linear or rotational hitting and hand path through the strike zone.

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