Unknown Warning Light!!

This weekend I went out for a spirited drive and noticed that as I was taking some agressive curves that this warning light would come on faintly and then disappear as I straightened up. It happened twice. The light is on the bottom right side near the spedometer above the ABS light. It's a small red circle with an exclamation mark in the middle hugged by two red half-moons. I looked everywhere in my manual and this light does not show up anywhere. Does anyone have a clue what it is and what it is warning me about? Any help would be much appreciated as always. BTW I drive an '02 360 spider.
Thanks.

 

I thought these cars did not have that system. I believe the tire pressure warning system came out in the F430's.

 

Right before the winter storage the dealer informed me that the front pads had 40% left and 25% on the rear pads. I'm getting ready to change the rear pads this weekend but they have no sensors on them. I don't believe that with 40% on the fronts the sensor would come on. Maybe the fluid is low and that is why the indicator lights up when I turn. I'm gonna change the rear pads to start and flush the fluid and adjust it properly.

 

Thanks Tarek. I will do exactly as you say. It all makes sense. I can't still believe I couldn't find that symbol in the manual. Thanks to all of you for your input. This site is awsome. Hopefully one day I will be in the position to return the favor. Now to the pad change!!