The gym is one of the most dangerous places in the world, on the one hand for your body by doing movements that will patiently destroy you like the squat or the deadlift, on the other hand because it concentrates a lot of people.
However, common sense, mastery of one's own emotions and one's ego are the qualities least well distributed within the human species.
This is why firearms should be banned to the public and people who commit traffic violations should be severely punished.