In Brick (2005), Emily slips a note in Brendans locker telling him to go to a specific phone booth.
She calls the phone booth, and they talk for a little. She says shes in trouble, but uses words Brendan doesn't know to describe the problem (Poor Frisco, Pin, brick, Tug).
A black car drives by and Emily screams. The passenger in the car drops a cigarette & Brendan rolls the cigaratte with his foot & a blue arrow mark is found on it.
Why did he roll it?