Lyric discussion by lactosefreeman 

Check out this part from an old interview from NME with Black Francis himself about "Here Comes Your Man":

"This is a pre-Pixies song that I wrote when I was about 15. It's about winos and hobos travelling on the trains who die in the California Earthquake. Before earthquakes everything gets very calm, animals stop talking and birds stop chirping and there's no wind. It's very ominous. I've been through a few earthquakes actually cos I grew up in California. I was only in one big one in 1971. I was very young and I slept through it. I've been awake through lots of small ones at school and at home. It's very exciting actually, a very comical thing. It's like the earth is shaking, and what can you do? Nothing."

That would explain why the lyric is "there's a box car waiting" instead of "there's a bockscar waiting".

@lactosefreeman who EVER thought it was [or what even is a] 'bockscar'

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