Mr. Woodstock: "Yeah, I smoked a few joints out in my car before coming up here."
Dr. Grumpy: "Why did you do that?"
Mr. Woodstock: "I was really nervous about coming in today."
Dr. Grumpy: "Why were you nervous? You've been here before."
Mr. Woodstock: "Oh, not about that. I've been drinking scotch all morning, and didn't want you to notice I was drunk when I came in. I've never been drunk to a doctor visit before, so I smoked some weed to calm down, because I didn't want you to think I'd been drinking."