This past weekend, while on a long run in the countryside with my running group, I had a close encounter with a wild cactus that was reaching out through a guard rail to touch someone, and that someone was me. It just goes to show I can't read (the directions printed out by our run coordinator) and run at the same time! I didn't even see the cactus.
Fortunately, it was a fairly light brush with the plant, but I don't think I got all the really fine needles out and am concerned about possible infection. A friend of mine suggested getting a tetanus shot.