James Cameron effects. The film was originally scheduled to be released in May 2009 but was pushed back to December 2009 to allow more time for post-production on the complex CGI and to give more time for theatres worldwide to install 3D projectors. Cameron originally intended "Avatar" to be 3D-only. "Avatar" broke several box office records during its initial theatrical run. It grossed $749.7 million in the United States and Canada and more than $2.74 billion worldwide, becoming the highest-grossing film of all time in the United States and Canada, surpassing Cameron's "Titanic". "Avatar" also became the first movie to ever earn
Titanic (1997 film) the film aided its popularity. "Titanic" catchphrase "I'm the king of the world!" became one of the film industry's more popular quotations. According to Richard Harris, a psychology professor at Kansas State University, who studied why people like to cite films in social situations, using film quotations in everyday conversation is similar to telling a joke and a way to form solidarity with others. "People are doing it to feel good about themselves, to make others laugh, to make themselves laugh", he said. Cameron explained the film's success as having significantly benefited from the experience of sharing. "When people have