I just finished working out and noticed I had a flat after like 30 seconds of driving. It was dark and I pulled over on an uneven/unfinished area of road. A passerby helped me out by holding a flashlight, we were chatting as I was working, then all of a sudden my car fell off the jack (the flat had been removed). I was so lucky I didn't crush my hand. After that I just called AAA to take care of it for me and I'll never try changing a flat again.