Something similar happened to me once. I was taking a friend out to dinner. There was this guy lying in the middle of the parking lot, right in my path. I sent her to call 911, and hoped I could remember my first aid training. I left the headlights on him, and got out. When I approached him he opened his eyes and said, “I’m sorry.” Then he wobbled to his feet and staggered into the night.

Overindulgence in some recreational chemical would be my best guess. I was glad I didn’t have to diagnose and treat some injury or collapse under those conditions. Dealing with the paramedics after the fact was more hassle than dealing with the “victim.”