Colorado’s chief chairlift inspector says the combined circumstances that led a Texas woman and her two young daughters to be thrown from a chairlift in December, leaving the mother dead, were so rare the probability was “like getting hit by lightning inside a building.” Larry Smith, the supervisory tramway engineer for Colorado Passenger Tramway Safety Board, also said the conditions were so complex and improbable that engineers were unable to replicate the exact scenario. “This is the first time in the history of Colorado skiing, it’s the first time in North America, we’ve seen an incident combine like this to cause a fatality,” Smith said Monday in an interview with The Denver Post.