You may be walking down a street in Bali, when the woman or man in font of you suddenly jerks their head sideways to their shoulder; no, they are not having a seizure, they're administering a bit if self-chiropractory, trying to 'crack' their neck in an effort to loosen personal tension , which probably builds up whist dealing with us Bules,
who knows? Having tried it myself, I can attest that it works.