After the game, Haaland was the only player who toured the stadium waving and applauding at fans.
Pundits with Spanish outlet Mundo Deportivo believe it's a sign he's saying his goodbyes to BVB.
"This gesture is likely a farewell to Borussia Dortmund supporters, as this is the last game that the German side has at home before the [winter] transfer window opens," Jordi Batalla writes.
However, we wouldn't want to read too much into the gesture, as the young man is simply enjoying his fame.
Haaland has now scored 53 goals in as many Bundesliga matches. Explains why Barcelona are probably trying to move heaven and earth to sign him.