I got a message from a woman who got a VCH piercing that was terribly botched. The piercing was wayyy too deep and the jewelry far too short; it became embedded under her hood. She suffered horribly in agony and nearly had to undergo surgery to remove the jewelry.
Image below is of the botched piercing. The "inverted-V" of the hood is marked. That is where the bottom ball of the curved barbell should be visible. The arrow points to the approimate location of where the piercing should have actually been made. You can see that it is about twice as "deep" (far away from the edge of the hood) as it should have been. And the jewelry was far, far too short. The piercing was done by Brandi Colquitt at Innercity Ink in Tulsa, OK.

She wrote:
I went 4 days ago and had a vertical hood piercing done. I was so excited, I had been wanting it done for some time. A woman I had been to for other piercings is who I decided to stick with for this one.
The pain was intense. I could barely stand it. From the beginning, you couldn't see the bottom ball under the hood. Three days later, the swelling and pain was so bad I could barely sit. I called the piercer and went in to have her check it.