The Unsub gets out of the car, then in the next scene the Unsub is shown still in the car. And is taken out by Alvarez.
When the unsub takes over people's cars, he tunes the radio to 98.2 MHz. However, in the US, digital FM radios only tune to odd tenths of MHz (97.1, 100.7, etc.). This is because each station is allocated a 0.2 MHz domain for their frequency to modulate (hence, FM).
When Reid comes into the room to meet the lawyer, as he takes his seat at the table you can see written on the wall behind him HANDS MUST BE VISIBLE AT ALL TIMES. Yet when he sits down Reid puts hands under the table right away. They stay hidden from sight until Reid gets agitated, and hits the table top. The guard not only ignores his hiding his hands, but has no response to his agitated stare.
When the unsub is in the car with the last victim, she tells him the brakes aren't working to which he responds "just drive." She panics and starts to hit brake while still telling him the brakes aren't working and fiercely stomping on the pedal. However, she's stepping on the gas when trying to stop.