How do you instill someone with false confidence?

Thank you for BA. I was in a bar in Fort Worth some years ago where every second bar stool was a saddle. Three wiry bowlegged guys came in, two late twenties, one in his teens. Bull riders. The youngest took the stool with the saddle saying, ‘You old guys better stick to them safe little stools.’ Before my companion and I finished dinner, the kid fell off the saddle that wasn’t on a horse.

Again. False confidence.