Basically, all students walk in a clockwise direction "with purpose" and not too slow a pace - encouraged to dance, while the music (today's song "Diam Diam Suka" by Cherrybelle) is playing, and as soon as the music stops, they must freeze in whatever position they are in.
If they are caught moving or making a sound, they must answer a question the teacher asks. E.g. "Apa artinya 'Ibu saya cantik sekali"? If they cannot manage to answer it, they are out.
Most of the time, for weaker students - I allow other students to whisper really loudly to help them out. But it worked great as a fun little cool-down at the end of the class.