Al Hooti saw red after committing a terrible two-footed lunge on an Iranian opponent just 34 seconds into their World Cup qualifying clash.
And the Bahrainis saw their night continue to go downhill from there, eventually losing 6-0 to their hosts.
Iran top Group E in the Asian qualifying round, with seven points from their opening three games.
But the crushing defeat left their opponents third, with four points from the same number of matches played.