[BlueHUMMERH2]

Some vehicles utilize a tilt sensor that will deploy the side curtains if the vehicle is thought to be tipping to "rollover". However, this same device usually will disable in certain conditions to prevent an incident like the one you mentioned. I am not aware of this happening to other H3's. Unfortunately, I do not have the technical expertise to tell you if the H3's system is designed to deploy based on a sensor that detects an imminent rollover situation. It is configured to deploy if a side impact sensor is triggered.