Before that, Peterson outlines three ways he can get the turtle to release once it clamps down. He can, 1. pour water over the turtle's head, 2. submerge the turtle in water, or 3. pour rubbing alcohol on the turtle's head. This all seems fine. He knows what he's doing. Right?
As it unfolds, you realize there are extra pains to each of these methods. The water goes into the wound and ultimately made the turtle clamp down harder. Dunking the turtle requires lifting a turtle with a hand in its mouth. That proves too painful to even try. Lastly, have you ever put rubbing alcohol on a wound? How about pouring a whole lot of it into a wound that is actively being torn open?
If you like to cringe at other people in pain, the play button is at the top of the page.