Went abseiling/rock-climbing with a group of 14+ kids from church yesterday and, having never done this kind of thing before, some of them were terrified!!  We spent some time with one particular lass who is usually the 'soul of the party', getting her to realise that there is nothing wrong with fear, provided it is based on respect - for the rock face and what it could do to one if you were stupid, and that she could overcome her 'worry' fears.  In the end, and very gingerly, she did.  She was in tears b the end of the abseil, but I think these were combined tears of relief, exhilaration and sheer panic!!