Mid- of year 2008, the movie 21 hit our cinemas nationwide. This movie is basically about a group of college students under the guidance of their lecturer, ventured into Las Vegas, played blackjack and indeed won heaps and heaps of money by using a trick known as "card counting". But soon after, their tricks were busted by the security management in the casino they often gambled.

Ben Campbell was basically the main actor here, he did most of the gambling and won most of the cash, but Ben didnt worked alone, he actually had Jill Taylor, Choi and Jimmy Fisher to help him out. They communicated very closely but this time, its in the form of nonverbal communication.

For example, Jill would at times use, "subtituting" - which means, instead of speaking, he uses hand gestures mostly to indicate if he need his freinds help. By then, one of his friends would actually come in and pretenting to persuade him to leave the table therefore Jill would not loose more money while gambling.

The other nonverbal communication would actually be "complementing"-a form of scratching your head to signal out some thing. In this movie, Jill often does this trick when he is sure that he could win lots of money from that particular table. So, his buddies would come in and gamble together with him.