An apparatus, system, and method for helping to protect occupants of a vehicle in the event of a collision. The apparatus comprising an inflatable tube having a first and second end connected to the floor of the vehicle and a middle portion therebetween and an inflator that is actuatable to direct inflation fluid into the inflatable tube in response to a vehicle collision. The inflatable tube is configured to inflate and deploy from the vehicle floor in response to receiving inflation fluid from the inflator. The middle portion extends from the floor and forms an arch into which the lower legs and/or feet of the occupant can move into in response to a collision and be restrained.