The extractor removes the case from the chamber and the ejector removes it from the gun. The only thing I can think that he did was pull the slide back to empty the chamber and when the ejector failed, it sent the live round back into the chamber. That's the only way he could have had a faulty ejector cause the loaded chamber. In IDPA, I have seen too many shooters go throught the mechanical motions to clear, without physically looking in the chamber.
Amen brother!