It's hilarious that less than 24 hours after Blank was on Monday Night Football saying that he was even happier with Petrino than when he hired him (because of how well he's dealt with adversity), Petrino quit on him. You'd have to think that Blank had no idea that that was coming - otherwise, why say that on MNF?
The biggest joke is that somehow Petrino was entitled to be unhappy because of the Michael Vick situation, but Vick was not going to lead the Falcons to their next deep advance into the playoffs anyway, so the team's long-term outlook was better without him given their higher draft picks and chance to build around a QB with more upside.