DO CELL PHONES MAKE YOU STUPID?

I'm starting to believe that the answer to that question may be yes.  Yesterday afternoon, I was on the elevator at work when it stopped at a floor below mine to pick someone up.  The doors opened, and there stood a disheveled-looking guy with a cell phone pressed to his ear.  "I'm getting on an elevator, I might lose you," he said.  Apparently the call was too important to hang up until he was finished with his elevator ride, but not important enough that he could afford to wait for the next elevator so he could finish the call.  He stepped on the elevator and the doors closed behind him.  He kept blabbing away on the phone, so apparently he didn't lose his signal.

The elevator stopped a couple floors below and another guy got on.  He stood at the front of the elevator, near the doors.  Phone Guy kept yakking away until the elevator got to the ground floor.  When the doors opened, Phone Guy, still jabbering on the idiot box, charged toward the doors and ran right into the other guy.  The guy turned and looked at him.  Phone Guy backed up as if to let the other guy go first.  So the guy started to exit the elevator again when Phone Guy charged off the elevator, sideswiping the other guy as he got off.  The other guy turned and looked at me with a "Can you believe this?" look on his face.  I just smiled and shook my head.

As I got off the elevator, I heard Phone Guy shouting into his cell, "Hello?  Hello?  Hello?"  Must have lost his signal.  What a shame.  Dimwit.