In Panthip Plaza, Bangkok I notice these two Thai ladies going at it.
Verbally sparring for supremacy as they try and garner attention from the buying public.
Whether their tactics of screeching into the microphone actually have any effect in persuasion of the public is questionable. The sing-song, back and forth effect is humourous and engaging though. Watch for how they 'duel' between one another to get a word in edgeways!