Brad: Hey, Mom, I'm done with my homework. I'm going to the mall.
Jill: Wait, wait, wait, wait! Hold it! I'll get my keys. I'll drive you over.
Brad: Sorry, Mom. You know the rule. You can't go to the mall until you're done with your homework.
Jill: Why are you suddenly remembering everything I've ever told you?
Brad: 'Cause suddenly it's coming in very handy.