ok, reason for the stop.. interesting... 
my youngest son won't go for dunny (bathroom) in the car.. even if he has his pamper on... you've to stop, let him walk around, play and then shout "Pishi Pishi" running to bathroom, stand there while wearing pamper and doing the stuff... if he needs to do this, we have to stop else he will be shouting at us to "ssstoph" ....
this way we used to spend atleast half an hour at places we never intended to stop 

oh, and no we didn't had a pitstop... no fuel and no food since things were closed at 5PM...