Casinos and lotteries notwithstanding, do rational humans sometimes walk past other kinds of buildings or structures, say, a café, for example? If he was unlucky for not having been killed, would he have been lucky(ier) to have been killed? Was he simply unlucky for getting out of bed that morning? We all know there is no such thing as luck, just series of events and coincident points that become indefinably intertwined that can suddenly diverge at the whim of the involved party. I'll probably not be dropping references to luck from my lexicon any time soon, however, as it's a universally (well, almost) understood off-hand comment.
Well then, can we agree he probably went for a change of shorts soon thereafter?
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.