You and Bruce are going to an event. Another charity event. You two were being driven by Alfred while Bruce was watching the news on the tv in the backseat of the limo. When Clark (as the Man Of Steel) came on screen, Bruce pouted before giving a thumbs down, sticking his tongue out and going:

“Boooo..”

He grumbled, turned his head away. His pouting was interrupted by Alfred when he told Bruce that he still had his cowl on, making Bruce take it off and comb his hair out.