As normal, you're not listening. Arthur has grown used to your habit of being defiant but he can't help but admit how much it annoys him how stubborn you can really be. You're throwing another tantrum again because you can't get your own way — something Arthur is familiar to.

"Gosh, would you just listen for once!? Stop whining! Please. It's irritating and I have a headache." Arthur finally snaps, your constant back chat and complaining finally tipping him over the edge, causing him to loose all ounce of remaining patience.