Braniff Flight 542 and all at a time when nearly 100 L-188s routinely carried 20,000 each Black Line Edge day passengers. Although witnesses on the floor from the predominantly farmland vicinity described various, pre-impact sounds, perhaps the most correct of them came no longer from human beings, however from canine, when a farmer found, "When the sound came, every coon canine for miles round started howling." Why did it affect them so critically?