-When you can't help but feel annoyed about people who don't know cars enough to get a bit angry. Hate it when I hear those popular kids talking about "knowing" cars...

-When you go drifting with shopping carts at the grocery store while you're bored when brought along with your mom. (I don't anymore, since she's gotten pretty mad about me accompanying her

)
-When you're having a conversation with someone, then see an interesting car and stop the entire conversation to look at it.
-When you ask your friends to borrow their cell phones to take pictures of cars you've spotted. Yeah, I don't have a cell phone.

-Boring your brother with always suggesting to play racing games when he wants to play FPS games.

-When your teacher tells you to make flashcards for vocabulary and add pictures to help, as always...adding pictures of cars that have to do with the vocab.

-When you flip through channels during the weekend during lunch and find some kind of motorsport airing and watch it long after lunch.
A bit long of a list? >_>