In Uruguay, to grab someone's attention or stop a bus, one might make a "ch-ch" sound.
Uruguayans stand close while talking to each other, both socially and in business.
Individuals contact shoulders and hold arms while they converse with each other.
Never sit on or put your feet up on an edge, work area or table.
The "ch-ch" sound is utilized to stand out enough to be noticed or to get a transport to stop.
The North American "O.K." sign is to a great degree inconsiderate.
You may see individuals brush the backs of their hands under their buttons to flag “I don't know.”