I remember a lady getting on the X10 in Lower Manhattan (The infamous 3:20 PM trip that skips the Narrows Road. The B/O had to shout, "First Stop, Slosson Ave" at every single stop). The lady only had cash on her so the B/O said, "Maybe someone can sell you a swipe". She managed to set someone on the bus to sell her a swipe. (Isn't that illegal?)