This is how the prayer went at the Pan-Orthodox Sunday evening Vespers I attended.
The Prayer of St. Ephraim of Syria.
Lord and Master of my life, drive away from me the spirit of idleness, despondency, ambition and idle talk.
But give rather the spirit of chastity, humility, patience and love to Thy servant.
Yea, O Lord and King, grant me to see mine own transgressions and not to judge my brother, for Thou art blessed unto ages of ages. Amen.
The prayer is read twice.
During the first reading, at the end of each "sentence", after the words "idle talk," "Thy servant," and "Amen" one must prostrate himself once each time.
Then it is necessary to bow at the waist twelve times, saying the prayer "God, cleanse me, a sinner!" The clergy reach down to the ground each time. I had never seen this before.
Then the prayer is repeated in its entirety, at the end of which one prostration is performed.
While everyone does the prostrations, only one priest actually read the prayer out loud.
However, the 12 x "God, cleanse me, a sinner"...was quietly said by each priest as each one bowed down, and reached for the ground. It took me a few Sundays to actually figure out what they were mumbling, since each priest spoke for himself.
Only a few of the faithful actually murmured the prayer of the 12 repetitions audibly. I am not sure if that's because they didn't know the prayer, or if that was proper protocol.