I've Got All This Ringing in My Ears and None on My Fingers

i think the canary coal mine is a different reference. coal miners always used to take canaries with them into the mines so they would know when the air got too dangerous to breathe (like too much carbon monoxide or something) so anyways the canary would drop dead and the miner would know it was time to leave...

i dont really know what this has to do with the song... perhaps he feels he'll be lethal to her?