by bse

Laughter epidemics, big and small, are universal. Contagious laughter in some Pentecostal and related charismatic Christian churches is a kind of speaking in tongues (glossolalia), a sign that worshippers have been filled with the Holy Spirit. Before looking askance at this practice, consider that it was present at the historic Cane Ridge revival of 1801, in Kentucky, and part of an exuberant religious tradition in which the Shakers actually shook and the Quakers quaked.