Lyric discussion by shaberry 

Cover art for Crashin' lyrics by Jack's Mannequin

I agree with Billiejoe- He found out about his cancer because of a medical examination when he had a serious caes of laryngitis. I think that he is saying if He comes back , will anyone be there to care? And what do you know? We do.

I'm sure there is one inspiration for him to write this song, be it cancer, a breakup, writer's block, whatever. But the lyrics are perfectly ambiguous so different people interpret it differently, which is so hard to do and awesome to hear. I think if you simplify and understand it most literally, the song refers to cancer, but ultimately I don't think that was his inspiration for the song, but it's truly up to you what the song means