I noticed this when reading the owner's manual for my Kimber a few years ago:
5. Safe Carrying Condition: Never carry this pistol cocked, loaded and ready to fire as this practice could easily result in an unintentional discharge. Do not carry a loaded gun with a live round in the chamber while walking, running or crossing any obstacle, where there is any possibility of slipping or falling as this could lead to a
possible unintentional discharge.