planned emergency landing/ditching - "BRACE, BRACE" since pax were briefed of the brace position upon cabin preparation.
unplanned emergency landing/ditching - "BEND DOWN, HOLD YOUR KNEES"
ON EVACUATION - "SEATBELTS OFF, LEAVE EVERYTHING, COME THIS WAY", "JUMP AND SLIDE"
These are the shout commands for EY in case you wanted to know the specific airline.. I'd be interested to know what they are for other carriers as well..