Puzzling Saab electrical system?
 

I'll start out saying I am no Saab expert. I've owned two and have really liked both of them other than the electrical system.

Last night on the way home from a basketball game, the car just stopped running while going about 60 mph. The key was still in the on position, but as I coasted, the front headlights stayed on but all the interior lights (dash) turned off. I finally coasted to a dead stop, put it in park, turned the key off and turned it back on and it started and made it home. I've never had this happen to any car I've ever owned. Any ideas what this might be?

Thank you for any thoughts / ideas.

Harold