Dean stopped walking, halfway to the car, and saw the image of the step pyramid again. Molly crying, the blood everywhere, the woman's throat being slit. A normal man would've vomited. Dean Winchester didn't vomit. But he did have to stop walking.
He swallowed before looking at Jo.
"I don't think it's really my place to," Dean said. "I just saw Harry's insides. And they weren't that pretty." He sighed. "I didn't want to do that to him, either. The shit he just saw... Do me a favor. Promise me you will never, ever, look Harry in the eye like that."
Jo was tough, yeah. But Jo hadn't been to Hell. Jo'd be a lot more hurt by seeing that stuff than Dean was.