Since it was in the leg maybe it was "Glock Leg".
Glock leg
A condition where a person shoots himself (or herself) in the leg while holstering their
Glock pistol.
This can happen with any weapon yielded by a careless user, but it is common among
Glock pistols due to the lack of a manual safety, relatively light trigger pull, and lack of a proper hammer to push on while holstering.