 Hey, pal, pardon you. The digital deadwalkers are multiplying. Until their behavior patterns can be modified, the American Academy of Orthopedic Surgeons warns all innocent people to stay alert. Better yet, to step up and speak out. Hey, dude, I'm walking here. Oh, sorry, I didn't see you. A public service message from the American Academy of Orthopedic Surgeons, who want to keep everyone well connected.