You are probably wrong. I've yet to hear any passenger account that mentions they were warned by the pilot that they were going to ditch or any account that cabin crew told them to don life vests.
It hasn't been confirmed that life vests were available on this aircraft.
mickjoebill,
You are probably wrong,
check that you
are wrong.
Life vests installed and their proper use in the unlikely event of a water landing demonstrated by the flight attendants.