The second Stanza was called the Antistrophé , from the Contraversion of the Chorus

It pains me to say that I must let you go.

[…] also effects the fore-aft (anteroposterior) wing motions known as promotion and remotion.

'Rob? It's Gary. Are you having any joy with this trip to Bali?' 'No joy at all, mate. I reckon Bali's out for the foreseeable future. […]