"Is this some sort of payback for the trial thing? Because if it disgusts you so much to work with me the door is right there." He can find another bartender, one that doesn't sass him and that actually teach him how to properly prepare drinks instead.

"I told you, I can multitask. Back home I had two jobs too. I was a member of the police force AND the Autobot Intel gathering body, and I was very good at it."

He puts the drinks down and rubs his helm, realizing that he was being too defensive. It's a thing that happens to him sometimes. He tries to sound more polite than demanding the next time he talks. "What about if you give me a few tips?"