It was 10v9 before Bayern scored, but what error?In fairness, from the highlights it seems as though the ref realised his error and made amends to Bayern by sending off two of the opposition defenders for merely existing, so I think it was 10 v 9 by the time Bayern took the lead, or certainly before the floodgates opened at least.
Of the 3 sending offs, the first one (against Bayern) was the most obvious.