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 .
According to the above context, answer the following question.
Why did the motorcycle blow up ?


It got hit with a gun .