A near miss and a lesson learned

Today on the way home from swimming lessons and working out at the gym we had a scare and a lesson learned.  As we were walking back to the car, Davis stopped and said he had to get a rock.  Later, he said "take the rock out of his mouth" and we had to pull the car over and take a rock out of Alex's mouth.   We are considering re-arranging the seating arrangements and will be careful about checking what Davis has in the car.  We think Davis understood that what he did was very bad, but he was said to see his rock go: "you threw my rock awaaaay".