Mexican Musical No-No's

Here's a tip for any foreigner living in Mexico...never ever knock, honk, hum or tap out the "Shave and a Haircut, Two Bits" tune. In Mexico it is one of the rudest things you can do since - for Mexicans - it is the audio equivalent of giving someone the middle finger (but a little worse because it includes the person's mother).

For more specialized insider tips, check out Tricks of the Trade.