seat belts, windows, children, out. reporter: old way of thinking was the only way to survive was letting the car fill with water before opening the door. not anymore. unless you want that to be your final resting place. get out while the car is on the surface. reporter: in the car, baby cpr doll in the backseat. divers in the water. one in the car for our safety. reporter: all right. it s go time. water is flooding in. see if you can open it. time to think faster. my pulse quickens. pull out. reporter: always keep a sharp object or window-punching tool like the one i m using in the car. and never use your phone until you are out of the car. if you touch your cell phone you are probably going to die. you have a one-minute period. you can open the windows before the water gets up above the side windows. reporter: i shimmy out as
letting the car fill with water before opening the door. not anymore. unless you want that to be your final resting place. get out while the car is on the surface. reporter: in the car, baby cpr doll in the backseat. divers in the water. one in the car for our safety. all right. it s go time. water is flooding in. see if you can open it. reporter: time to think faster. my pulse quickens. pull out. reporter: always keep a sharp object or window-punching tool like the one i m using in the car. and never use your phone until you are out of the car. if you touch your cell phone you are probably going to die. you have a one-minute period. you can open the windows before the water gets up above the side windows. reporter: i shimmy out as water engulfs the car. a few tense seconds later, the experts pop out. their training the difference