Once the suv loses power to ascend, the driver may have panicked not knowing what else to do or the suv may not be able to ascend even if engaged in low gear. Braking would just hold the car stationary for a moment but the next move is crucial for survival. If overloaded, maybe the driver should ask the occupants to go outside and walked a distance until the ‘problematic’ stretch of road is over. Thais ,being face conscious ,would definitely try to resolve any problems on their own not knowing that other lives can be at stake here as in this case.