Cactus flower in my parents' backyard, 2005, click for bigger.
When you grow up in the suburbs of Tucson, there are certain things you can do like normal American kids (ride bicycles), and certain things you can't (roller skate down the sidewalk – no sidewalks!).
Here's a good example of the latter: if you're going to fool around in the desert, it's probably not the best idea to play Blind Man's Bluff, because if you're "it," and you can't see where you're going, chances are you're going to fall right into a patch of prickly pear cactus.
And that's exactly what my sister did.