[emaxos]

I thought it was a questionable call. When the ball was returned from the outfield after the fly ball catch to Cat, she was outside the circle and the runner was off the base. Cat seemed to give the runner a direct look, then stepped into the circle.
When she stepped back into the circle, the runner, who was only about two strides off the base, returned to first base. Maybe not lickety split, but she did return.