Complex sentence: As the blast wave passes, Jimmy and Bob clamber out and Jimmy runs to his car, shouting that he is going to try and reach Ruth, but the car will not start so he sets off on foot through the chaos.
Split into simpler sentences: As the blast wave passes, Jimmy and Bob clamber out and Jimmy runs to his car, shouting that he is going to try and reach Ruth. The car will not start so he sets off on foot through the chaos.