booted call - what to do

[brost]

As soon as you call it Foul, it's a dead ball and you can't 'bring it back to life'. So generally when in doubt, wait until you call foul because it is much easier to call foul late and send runners back than to deal with the situation described above.

The only two things you can do is to:
a) lie to the coach "skip, i clearly saw the ball touch the ground right behind the bag without touching the bag"
b) pray and hope

On a close one you might get away with a) which has the advantage that the game cannot be protested.