'Don't look so innocent Doctor, I know that look, when you cheat at Scrabble!'
'I do not, and never have cheated at Scrabble Donna' he protested.
'Ha, you so do. You use words that aren't even English! And you are cheating again, right here and right now!'
Donna got up from her seat and overturned the game, promising herself not to play Trivial Pursuit with the Doctor ever again. He knew all the answers, not surprising that he was a time traveller, and had a brilliant brain as well. She heard him mutter something as she left the room in a huff.
'I'm not cheating. I can't help it that I'm clever'