A show of 'jazz hands'

Visitors to the National Union of Students' annual Women's Conference in Solihull were asked to show ‘jazz hands’ rather than clapping, as clapping may trigger anxiety for some people and definitely no ‘whooping’ should they agree with a speaker’s remarks.

Nona Buckley-Irvine, general secretary at the London School of Economics Students' Union said, “jazz hands are used throughout NUS in place of clapping as a way to show appreciation of someone's point without interrupting or causing disturbance.”

In the basic jazz hands position, the hands are open, the palms face forward, and the fingers are splayed; in addition sometimes the hands are shaken and the fingers are moving. (Wikipedia)