I was driving my 2003 lexus gx470 on my way to the hospital with my three year old son ' who was experiencing breathing problems. i lost control of the suv near the exit for the hospital ' as i was preparing to take the exit from the freeway. the vehicle went off-balance and did a 360 degree rollover from the exit ramp. i ended up in the median between the off ramp and the on ramp. my son and i were intact after the accident. the vehicle behaved erratically during the episode ' and i could not figure out what was happening with the controls. i would like for nhtsa to look into the stability system of this vehicle ' based on this experience and recent news of similar vehicles from lexus. *tr