Indicators of potential workplace violence

Crying, sulking or temper tantrums.
Excessive lateness.
Disregarding acceptable conduct
Disrespect for authority
Worsening work quality.
Refusal to acknowledge job performance problems.
Faulty decision making.
Trying to see what they can get away with.
Swearing or emotional language.
Handles criticism poorly.
Making inappropriate statements.
Forgetfulness, confusion and/or distraction.
Inability to focus.
Blaming others for mistakes.
Complaints of unfair personal treatment.
Talking about the same problems repeatedly without resolving them.
Insistence that he or she is always right.
Misinterpretation of communications from supervisors or co-workers.
Social isolation.
Personal hygiene is poor or ignored.
Sudden and/or unpredictable change in energy level.
Complaints of unusual and/or non-specific illnesses.
Holds grudges, especially against his or her supervisor.

That would be true i believe

•as parts of ceremonies and often to ask for peace and blessings from evil. • late at night to entertain themselves or foreign visitors at the camp. • on long journeys through the arizona desert, to keep their energy and minds boosted. • during the long winter nights, when they were cold and the land was not suitable for farming.