If this account is accurate at all (debatable), I would guess it was a case of an inexperienced shooter who was anxious, awakened in the middle of the night, and not focusing on what he was doing.
I have seen many people point handguns at themselves unintentionally or wave them around.
I would be calling 911 from my vehicle. Everything I own is in a safe, insured, easily replaceable, too heavy to move, or otherwise not worth dying for.
- Jim