oh , oh , oh , oh , i 've only the moon to sing me down the road , only the moon to warm me in the cold , only the moon to watch me weep , only the moon my secrets to keep , only the moon to hear me say , come back , come back , come back ... '' and then she repeats the refrain , `` only the moon '' in the same grief-wrought wail , the instruments all playing in a crashing clash of colliding sounds , the didgeridoo puffing and buzzing like the breath of a predator , the mandolin circling and circling high rolling circuitous notes , the acoustic guitar providing a fast chugging base-rhythm , the electric guitar mirroring echo 's sung melody , the bass thrumming beneath it all louder and louder like the rumble of distant thunder , until all the instruments fade away and all that remains is echo 's haunting wail and the reverberating bass .