[mick]

Originally posted by Jim Porter
At one time, pro schools taught umpires to start by straddling the line.

Now, they teach them to start in foul territory so that, when they pivot on their right foot, they end up in a position where their belt buckle is directly over the line, effectively straddling it.

Jim,
From my experience, I would be pushing off with my left foot and, thus, would be unable to pivot with the right which is then airborne.
mick