I bet it happens more often than you'd think.

Once upon a time, I used to be an Athletic Trainer, and was responsible for emergency care of a few travelling football and hockey teams. I used to have info cards for each location we played and stayed at, including address, major intersection, and a map of the location and building/field floor plan. It really helps to have the details written down, especially if you might have to ask someone else to call 911.

I guess with cell phones these days you could have all that info at your finger tips, but it takes time to find it. Of course, you're not going to walk around with hard copies of that info for every location you'll ever be in or pass through, but situation awareness would help. It's really easy to loose track of exactly where you are sometimes, and even if you don't, recalling that info in a crisis can be a challenge.