..."The test is meant to push the plane beyond its limits. Engineers had the plane pressurized and on the ground. They loaded it up well beyond capacity and bent its wings in an extreme manner, in a way almost certain to never happen in the real world."
Per the FAA (https://www.faa.gov/regulations_policies/advisory_circulars/...), the actual number for "Almost Certain to never happen" is no more than 1 loss of life per 10^9 flight hours. There's a real number behind that term, but not necessarily a stat that's accessible to the average news reader.