Which buddhist traditions use silent visual applause, instead of clapping, to show appreciation and what is the origin of this practice?

In sanghas following the tradition of Zen Master Thich Nhat Hanh, to show appreciation one does not clap, instead one flaps his/her hands. This silent visual applause is similar to the sign for applauds in American, British, French and possibly other sign languages used by deaf persons. Which other buddhist traditions also use silent visual applause to show appreciation? What is the origin of this way of showing appreciation in buddhism, was it borrowed from a sign language, and if so where and when?