Ok, is *this* a sign that I should getting Myles a Psych evaluation over

He is very carefully lining up all of his Matchbox cars on their roofs with their wheels in the air. And sometimes he is stacking them atop each other, but mostly it is a line of turned-over cars. Is this some weird behavior I am supposed to discuss with a doctor?
It is kinda funny looking, too, because most of his cars at my parents' house that he shares with Crispian are hand-me-downs from my cousin Eric who is also, uh, over 30. Most of the are Thunderbirds and Mustangs from the 70s--the piles look like one of the nightly wrecks from ChiPs.