ND: Bad Holster manipulation? (Graphic Content Warning)

The original thread at the at the S&W Forum does not give any explanation about how the Negligent Discharge came to happen, but I suspect there was some sort of brain fart while holstering by the way the wounds look. Perhaps the booger hook on the bang stick while holstering the gun?

Just a reminder that if we don’t play safe, somebody will get hurt.

That shit hurts just looking at it. 🙁