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!