Lawyer later

My brother - 5 yrs old - and my sister - 6 yrs old - were sitting in the back seat of the car sniping at one another as siblings often do. Finally, out of frustration, my brother says, "When I get big, I'm going to be a policeman and arrest you!" Without missing a beat my sister says, "Yeah? Well when I get big, I'm going to be a lawyer and sue you for wrongful imprisonment!" 20 years later, my sister IS a lawyer.