When you are a bicyclist and you see a rattlesnake in the road, you definitely let it go on its way before you proceed. But then if it just sits there, you throw a rock (or two, or three) at it to get it to move along. Then, you might see the rattlesnake show real displeasure at having rocks hurled at it by curling up and letting you know to back off and just WAIT.
I'm a transplanted New Yorker who loves the Tucson climate. On New Year's Day I have a bit of fun calling my (snowbound) east coast friends to announce that I'm drinking coffee while sitting on my patio. (: