To the uninitiated, sign language is even worse...

as a cause of misunderstanding.

Matter of interpretation...
 
A woman gets on a city bus. She looks at the driver and holds up one hand; the driver holds up two hands.

Next, the woman points up; the driver points down. Then, the woman grabs her breast; the driver grabs his crotch.

Finally, the woman grabs her butt and gets off the bus.

A curious passenger asked the bus driver what the odd motions were all about.

The driver explained, "The woman is a deaf-mute. She asked me if a bus ride is five cents, and I told her it was ten cents.

Next, she asked if the bus was going uptown, and I told her it was going downtown. Then, she asked if the bus was going pass the milk-farm, and I told her it was going pass the ball-park."

The passenger interjected, "Okay, but why did she grab her butt as she left the bus?"

The driver continued, she replied "Oh shit, I'm on the wrong bus!"

Link