"Lady and the Tramp" 1955
Milt Kahl animated the next sequence.
Lady found out at the pound about Tramp’s past with all these other girls. Tramp realizes she knows the truth. His reaction also shows embarrassment, he is faking a smile, but deep inside he knows he is in trouble. This is very complex character acting, rich and insightful.
So yes, Milt Kahl is AMAZING, too. But you knew that already.