[mcrowder]

LBR is actually pretty easy, if you take it in steps.

First - when is it on, and what turns it off:
It is on when: A) Pitcher has the ball in the circle and is not making a play, and B) BR has achieved first base.
It turns off if the pitcher makes or fakes a play.

Second - when it is on, what can the runner do:
A) the runner can continue going in the direction she's going ... for as long as she wants, at whatever speed she likes.
B) the runner can stop at any point (if the runner is stopped off the base at the moment LBR is turned on, she's already in her stop). Also note that simply reversing her direction is considered a stop.
C) she can stay stopped for a VERY short time (generally 1 second) to decide which way to go.
D) she can then proceed in any direction ... for as long as she wants, at whatever speed she likes.

Third - when it is on, what can the runner NOT do
A) The runner cannot stop for more than the amount of time necessary to make a decision - generally 1 second or so.
B) The runner cannot leave a base if she stops on it or is already stopped on it with LBR turns on.
C) The runner cannot stop (or reverse direction) twice. (This includes dancing).

Really pretty simple.