It was a minor news item when a Barack Obama aide fell off a Chicago curb while texting on her BlackBerry. Evidently, she is one of way too many people getting hurt as they text while doing something else at the same time. The ability to multi-task can be a great thing, unless it's taking attention away from where you are walking, bicycling, rollerblading, driving, cooking, and even riding a horse!The American College of Emergency Physicians has even put out an alert, because of the rising reports from doctors around the country who are seeing injuries as a result of text-messaging "on the go." Two people in California have died while texting as they crossed the street, because they weren't looking around at their surroundings before stepping off the curb.I've been amazed to see bicycle riders pumping quickly around my neighborhood while either holding a cell phone to their ear or texting with one hand, while supposedly steering their bike with the other. It's amazing to see, but quite dangerous to do.