"What are you doing?"
"… Nothing…"
"You're hiding something from me, so I'm pretty sure you're doing something."
"Fine, I'm hiding something from you."
"…"
"Well, you were the one who pointed out I had to be doing something."
"…"
"Your grudge against this little technicality is amusing, especially since you were the one who pointed it out."
"… Shut up."