Money was locked in. You couldn't atm, bank teller, eftpos, internet bank, or anything to get your money out. They actually shutdown branches.I wonder if CBA's issues were related to a software 'upgrade', it always seems like an oxymoron, upgrades seem to cause problems when they are meant to fix them.
I know a few people who got stuck at the petrol station not being able to pay after filling up. Just imagine a week long debacle.