When are they out?

[DaveASA/FED]

I agree with you but how do you know? If you are PU you are watching the runner and F2 for possible OBS, trying to watch the play at 2nd some but you don't know when the tag it made, you can hear when the out is called....never thought of this before but how do you know when that happens? If BU is doing what they should they are inside on a throw from outfield watching the tag so they can't see if the runner has hit the plate yet, and PU is blocked from the tag by the BU, BR and maybe even a couple of fielders.