It’s a comment on unsafe pistol presentation.
First we had TV and the movies borrowing an Israeli technique of holding the pistol sideways (and adopted by gangstas and the great unwashed, nationwide), which is finally losing it’s appeal – now, everyone in Hollywood seems to be using the cavalry presentation, with and without holsters (!)
When done properly, it can be done in relative safety. But it’s slow, and, at least on TV is rarely done correctly.
And, it doesn’t help when well-known holster manufacturers reinforce poor technique, in an effort to push more leather.
The point being, unless one draws correctly, one crosses oneself with the muzzle. And class, we all know that violates which Rule? (if not, see the right sidebar).
AND, with the advent of smaller and shorter pistols in better calibers, even using a standard strong-side presentation into Weaver or Isosceles could have the student preparing to shoot themselves in the weak hand, making it even weaker.
DON’T cross yourself! Remember the Four Rules.