Doc usually refers to Lightning by a nickname. ‘Rookie’, 'kid’, 'kiddo’, 'hot rod’ are his usual picks. So when he uses Lightning’s actual name, the racer knows he’s in trouble.
Doc calling him 'Lightning’ is a warning sign, and if he’s paying attention he’ll usually stop whatever he’s doing that’s irritating Doc. If he’s being stubborn he’ll probably carry on, and 'Lightning’ gets upgraded to 'McQueen’. That means Doc’s had enough and Lightning’s not getting a third warning.
Getting called 'Lightning McQueen’ right off the bat means he is in capital T trouble and if he can he’ll take off and hide until Doc’s cooled down (it never works–Doc always finds him)
Hey my friends! Another piece I put together almost 2 years ago at Disney Publishing… Wow time flies!! Cars 3 is still the subject, early stage doing color tests and stylization. A big shout out to the awesome art team! So proud :)! Go check the movie people, it looks so good!