What do you do when a cabby tells you he's not on duty? If you're this guy, you attack. According to the NY Post:
"Frank Sestak, 34, asked the cabby if he was on duty at First Avenue and East 93rd Street at 10:15 p.m. Saturday, according to the sources.
The driver, 25, said, "No, I'm parking."
Sestak became irate, breaking the driver's-side window with his hands and assaulting the cabby, authorities said. He was charged with assault and criminal mischief and given a desk-appearance ticket.
The victim suffered minor injuries."