Personally I believe that Eugene shot the truck on purpose, only because (spoilers) he doesn't want Abraham to find out he's a fake. I believe this because he smiled a lot after his conversation with Abraham after shooting the truck.
To the two girls in the video... I want you to say all of this Selena and Justin crap again, right now. After Justin has been to jail and bit a boob I want you to say that again... Taylor is right it would be best for Selena to stay away from JB.