Strange Thing Happened Today

I went for a cruise today in the 300. After around 10-15 minutes of driving, I came up to a stop sign, stopped and the car quit. I put it in Park, turned the key and it fired right up. I threw it in Drive and continued my cruise without further incident. I'm just curious what could cause this immediate shut down. It's never done that before. The car had been sitting for a few weeks, I'm wondering if that had anything to do with it. Any thoughts?
Author: rexus31