"All the other kids with their pumped up kicks...better run, better run...."?

Have you guys heard "All the other kids" by Foster People? Well, I thought it was just the average weird catchy sing along song on the radio for a while now, but today, out of curiosity, I searched the lyrics, which were actually kind of disturbing. What is your opinion of the lyrics? And is the song about a kid that was abused and teased, shooting it out? A sociopath maybe. My friend seems to think it's not a real gun...

Oh, and here are the lyrics....
Robert's got a quick hand.
He's looking 'round the room, he won't tell you his plan.
He's got a rolled cigarette, hanging out his mouth he's a cowboy kid.
Yeah, he found a six shooter gun.
In his dad's closet with a box of fun things, I don't even know what.
But he's coming for you, yeah, he's coming for you.

All the other kids with the pumped up kicks, you'd better run, better run, outrun my gun.
All the other kids with the pumped up kicks, you'd better run, better run, faster than my bullet.