This may have been due to his recklessness as a pedestrian. As noted in his obituary, he "persistently flouted traffic signals", and dismissed cautionary warnings from friends with the reply, "We are all going to die some day."
The cause of this incident may have been due to his reckless behavior as a pedestrian.  As noted in his obituary, he frequently violated traffic laws and dismissed safety advice from friends by saying, "We're all going to die eventually."