I was on a plane during the Northeast Blackout of 2003. Landed, got in my car, and attempted to leave the parking garage but with no power the automated EZ-Pass payment wasn't working nor were the credit card machines. Most people, myself included, had neither sufficient cash nor a checkbook on hand. Huge logjam of cars. The workers ended up getting the old school handheld metal credit card machines that created an imprint of the credit card on carbon paper from some long forgotten storeroom and using them.