Sir, please put down cell phone

I’m halfway through Malcolm Gladwell’s superb book Blink and stumbled upon the Harvard’s Project Implicit (try it here). I took the race exam which determines if there is an association between White Europeans and harmless objects or Blacks and weapons and discovered something disturbing: no, not that I have a deep-seated belief that blacks are violent but in 3 out of 4 cases I categorized a cell phone as a weapon.