This might be the best prank you’ve ever seen in your life. The other side is, as long as nobody is physically hurt, it’s okay. Ever heard of post traumatic stress disorder, aka the psychological problems you can get after a trauma or thinking you are about to die? Seeing someone shoot themselves in the head, even when they later found out it wasn’t real, can have a huge impact on a person’s life.
I sincerely hope that those girls were actors because if they weren’t they could be traumatized for quite some time after this.
If this was you, would you have sued?