Foul tip in the dirt mechanics and help?

[jmkupka]

Not that I do this, but it got me thinking...

If a BU sees a ball shoot sharply and directly to the dirt (with absolutely 0% doubt) then up into F2's mitt, and his partner does not (blocked out, whatever), how is this any different than a ball skipping off the side of the batter's foot (which we kill when we see it)?

By the way, the argument is not if the ball is caught in flight, but that the ball was never contacted by the bat at all (1:30 "he never touched it")