Slipping on the backswing

What is the rule if you slip over on the backswing or downswing and miss the ball as a result?

All I can find is the rule that if you intended to hit the ball and you missed then it's no penalty, but you count that stroke as a shot.

However there is also a rule that you can pull out of a shot if you wish (I recall Tiger doing this at the Masters a few years back)

Just looked in the updated decisions on the Rules of Golf 2010 - 2011 plus illustrated version and can't find any reference.

Like you say grey area and would say Wayne is correct.

I reckon that the bird came into Tiger's view during his downswing and he definately intended to abort the shot (loking at the clip again you've still got to admire his control). For us hackers though, at that point,  I reckon we'd still go through with the shot. 

This woman has no intention of pulling out of her drive... bird or no bird!!!!

Not another one of Tigers birds coming out the woodwork is that #9

Jonny,I agree that it's an airshot and  if one tries to stop then this would I believe have to be called on by ones self as only that person would know if they were trying to abort. From experience I've never managed to stop after a slip but never totally missed the ball either

Incidentally I recall Big John Daley trying to abort after acamera went off.His injury caused him to withdraw from the event and visit the hospital .