The bright idea of having your friends sit in the trunk of a sedan because you can't fit in the car... and to have one your friends yell out, more than once, "No! We're 30 years old!!!"
... as she walks towards the street to call a cab. I follow behind her, amused at the thought of age-appropriate behavior.
The last time i was ever in a car with people sitting in the trunk because we couldn't fit any more inside was in 1999. I was 15 years old.