You just need to do the right dance. If you're lucky, he may compliment you by saying: "That's the TICKET! You're looking FINE!"

if OP ever gets kidnapped he/she now knows how to catch a cops eye

this sounds like a reference to something musical I've heard before

Also, the question how was Op dancing in the passenger seat of the car might need some clarification. Unless OP is a Verne troyer sized little person I can't imagine how they could have enough room to dance. I just imagine OP looked like a wacky-waving-inflatable-arm-flailing-tube-man, which would concern me if I were a police officer...or a doctor..

Or he was just dancing cause he wanted to.

Did OP leave his friends behind?

'Cause his friends don't dance

... And if they don't dance, well they're no friends of mine

I love dancing along to songs in the car. Of course I'm sitting down but I can still move side to side and wave my arms. I can't be the only one who does this?

The Seizure

Brake dancing.

Much better than mine^

Let's try not to exhaust the car puns.

OP should post a video on YouTube.....I need to see this dance :-)