Is that an excuse for a chipmunk crossing the road? Seriously, as a member of intelligent species you don’t <i>need</i> fear to inhibit yourself from doing such a senseless and risky act of crossing in the middle of a busy street. A rephrasing of Hanlon’s razor is appropriate here: “Never attribute to lack-of-fear that which is adequately explained by stupidity.”  Indeed, normal people with fear intact perform such risky acts on a daily basis (i.e., despite being fully capable of fear); I was raised in India, where busy streets with erratic traffic patterns are usual, so I should know.