Some Frontier Airlines passengers gave a good reminder of one of the key safety rules if you're ever evacuated from a plane: leave your luggage behind. Late on Friday, a Frontier airplane struck a person on the runway as it was taking off from Denver International Airport. Videos and images shared from both inside and outside the airplane show the commotion as some passengers brought their luggage with them, with some even carrying it down emergency slides as they evacuated. In footage taken by