I had a flat tire at work on the Friday before a 3-day holiday; the dealerships were closing early. As you know, there isn't a spare--there's a kit for filling the tire until you can get somewhere to get it fixed.
The kit was dead as the tire. Totally useless.
I called 911, and got nowhere. I called my Hyundai House, and had only half an hour to get there before they stopped for the day, but they gave me the number of Hyundai Road Service. When they answered the phone (45 minutes later) they sent a wrecker which was supposed to arrive in another 45 minutes. It didn't--it was there within half an hour, even with the added confusion of giving the driver the wrong address. We got to Automax Del City after they had ended the day, but they knew I was coming, and they immediately checked my tire and told me that it couldn't be fixed. Within ten minutes I had a date to finish the replacements and a rental car so I could drive the 50 miles home.
This could have been so much more difficult than it was! I am grateful.