What does "Crew: Top of your mind!" mean in commercial aircrafts? On a flight this year in Europe, the pilot or co-pilot announced midflight "Crew: Top of your mind!" via the loudspeakers. The crew didn't visible react on that and I couldn't notify any change in the flight after that. What does this announcement mean?

The flight was either with Swiss, Air Serbia, SAS or IcelandAir. Unfortunately, I can't remember which one.
Could it rather be « crew: top of climb » which some airlines use, but 2 things contradict this: a TOC mid flight is unlikely and although used by some airlines it is more the top of descend we indicate to the flight attendants for them to start preparing for landing.