Context: Before the cop could get off a shot , my friend lifted a rifle and fired a round right into the gas tank . The motorcycle burst into a fireball , of course - really great action movie stuff here , folks . Then my friend looked at me with a slight smile , an expression of deep care and affection that said , " I \' m here for you , Trevor .
Question: Why did the motorcycle blow up ?
Option 0: A truck hit the gas tank .
Option 1: The cop blew it up .
Option 2: The cop fired into it .
Option 3: The narrator 's friend shot it .
Answer: 3