Why do people make that clicking noise to encourage horses? Do horses have some predisposition to knowing what it means? Where does it come from? Is it just like the whole 'woah' thing, and the horse learns an association? Is this a stupid question? (Only asking cause I can't flamin do it, and watching that Pippa Funnell dvd free with a horsey magazine this month and its starting to bug me!):redface: