Little brother is watching stories of the highway patrol or somesuch where someone is trying to outrun the police car and this has resulted in a helicopter chase. He runs the red light and pulls onto the freeway doing 90 miles an hour followed by the highway patrol, this protein is going nowhere in a hurry and if they don't catch this rogue red light runner bad news for you. Mattie immediately sees that this is like traffic in the cell that goes bad, that cancer is like a highway bandit.
One person says, "its like traffic", someone else says, "its like a roller coaster". that leads mattie to make a connection.