Its the brake warning light. Were you cornering briskly?
Draggin is right....it's likely that your brake fluid level is low, or falling below the sensor level during sharp cornering. I've experienced the same issue and resolved it easily by simply by topping off the brake fluid container. Be careful not to overfill because the fluid will leak, even if the cap is on tight.
I filled mine to within roughly a 1/4" of the top. My dealer instructed me to do this.
