Quick Thinking

Tyler and John are playing with their remote control cars in the park. Faye and David are on the beach. They see a man take a woman's bag and run to the park. How can they all help the woman?

 I think they are so sensible in emergency. They used their phone and cooperated in seconds. If I were in emergency, perhaps I couldn't come up with a good idea.
 My favorite scene is the last which they catch the thief.