A safety system that provides specific warnings to an occupant of a vehicle engaged in a certain activity that can cause an adverse outcome in an event of a Sudden Decrease in Ride Smoothness (an SDRS event). The safety system includes a sensor that takes measurements of the vehicle compartment, and a computer that estimates, based on the measurements, whether the occupant of the vehicle is engaged in a certain activity that can lead to an adverse outcome in case of an SDRS event. Responsive to receiving an indication indicative of an imminent SDRS event and estimating that the occupant is engaged in the certain activity, the computer provides a specific warning to the occupant. The specific warning describes a specific action related to the certain activity, which the occupant should take.