What is your favorite scene that shows just how smart Shawn really is?

So we all know Shawn is brilliant, but he downplays it so much and goofs off so often we rarely get to see it, what’s your favorite scene in which he shows just how smart he truly is?

Mine is when he recreates the battlefield after seeing it only once, and when he tells Jules and lassie that he got a 100 on the cop exam