When President Bush ducked shoes thrown at him, Prime Minister Maliki, standing right beside, barely flinched. This confirmed a theory that we have a dual vision system - human brains "see" things far before the eyes.
President Bush ducked because his brain’s action pathway labeled the trajectory of the shoe as a threat well before his perception pathway began to track its flight. Maliki's brain, however, realized the shoe wasn’t headed his way - so he didn't duck.
The findings have implications for sports, among other things.
