A: My tap card isn't working! B: Why not? Try it again. A: It's still not accepting the fare. B: Is the magnetic strip broken? A: No, I just used it at the station. B: Did it run out of credit? A: No, I just refilled it yesterday. B: Did you tap it upside-down? A: I tried flipping it several times. B: Look, you're using a metro card. A: What's the problem with that? B: This is the Montebello bus line!