So, in two man mechanics, do we see this?
During the play
Plate Umpire: Indicates obstruction, does not call time.
On the tag of B/R:
Field Umpire: Out signal
Seeing action has stopped:
Plate Umpire: Time! Obstruction at first base, you, second base!
Field Umpire: On the tag, you're out!
Or should the Plate Umpire make just eat the earlier acknowledgement of obstruction?