But the accident didn't occur while belaying a leader - it happened while belaying a second from the top. If the redirect pulled, the braking position is in fact the opposite direction from what it would be with an intact redirect.
I was just following r's comment about belaying the leader. I kinda get what R's saying, but I probably just getting the words and mental pictures wrong.
When belaying second off the harness with redirect, the ATC configured is in the same mode of lead belay (not in guide mode), the brake hand position is the hip position, no?
Anyway, I probably should start a different thread to clear this for myself.