This has been annoying me since last night on the subway, where I snapped it. Either I'm an idiot, or somewhere there's a stoopid copywriter.
Anyone who swipes a credit card, or a Metrocard, knows there's a magnetic strip on the back, usually at the bottom. And orienting it correctly before you swipe is the key to getting it accepted.
So - assuming that you are a moron and even try and swipe a card's short edge.... there's two short edges with two sides, so that's four ways. Holding the card upside down is another two ways. Holding it right way up but reversed is seven..... so what the hell are the other two ways that are the wrong way to swipe?
Maybe swiping a card while thinking too much about crappy subway ads can count as a wrong way.