[PMCarey]

Just because the umpire calls the third strike and an out does not mean the batter cannot advance to first on an error by the catcher.

You're right on the third strike, but if the umpire calls you out, then you're out and you can't advance. It sure looked to me like the umpire made two distinct the motions: the first to call the third strike, the second to call him out.

[nikos1121]

"It sure looked to me like the umpire made two distinct the motions: the first to call the third strike, the second to call him out."

How does the catcher, with his back to the ump, know that?