I never gave it a thought that the light was actually trying to tell me something...what happened was this:
Two Mondays in a row I went out to start the car to go to work. In each case we'd used the Cherokee all weekend and the Mystique had just sat in the driveway. As I turned the key to turn the engine over, the speedometer needle rose to about 40 mph, went back to 0, and the air bag light started flashing. I didn't think to count the flashes. Since then the car has been used daily, and the problem has not been repeated.
Ooh, you think perhaps the battery is beginning to get a little weak? It IS the original battery (98,500 miles on a '96!)