This is absolutely crazy. Normally when you see these stories it's rowdy customers fighting each other or the cashier getting beat down. These two ladies picked the wrong McDonald's cashier to mess with.
According to wpix.com, the argument started over a $50 bill. After an initial slap in the face the customers jumped the counter and were met with a metal rod to the head. The cashier himself was just released from prison and on parole for manslaughter. Check out the video after the jump.