Lyric discussion by a-girl 

Cover art for Bullet lyrics by Mason Jennings

I'd been singing this song to myself for days when I realized why it was so catchy. Its rhythm isn't metrical (like iambic pentameter); it's stress rhythm, so that words are stressed no matter how many or few syllables there were between the last stress, if that makes sense. That's why it "sounds happy like a nursery rhyme." :)