At my friend's house:
me: "M, it's time to go home, go find your shoes."
M: "No! Shut up!"
me: "If you say shut up you will have a time out in the car, strapped in to your car seat, when we get home."
me: "C'mon, come get your shoes."
M: "I feel like if I walk over to get my shoes, I will say 'shut up' again."
me: "Well, if you don't get your shoes then you will also have a time out strapped into your car seat when we get home. So just try not to say shut up and go get your shoes."
M: "Well, we have a problem."
I am so glad M couldn't see my face at the time, because I barely held in a laugh. M has some good emotional intelligence going on.