Let's be very clear.
This is a very dark song.
To be clear, when Mark Foster wrote and performed the song, he was trying to write from the perspective of a homicidal kid thinking about shooting up his school. Written in an afternoon, Foster had been writing commercial jingles and plowed through writer's block to get this song done.
And, for a song that was just a demo, with Mark Foster singing and performing every piece, it's pretty rich and strangely beautiful.\