The hypodermic needle theory suggests that media can directly inject ideas into people's minds, potentially changing their beliefs and behaviors. It proposes that exposure to media like advertising, news, and films can promote certain values and influence opinions on topics or social groups. The theory is demonstrated by how Red Bull advertising ubiquitous branding builds association with extreme sports to influence lifestyle choices, and how films use techniques like costume and behavior to subtly spread views about different ethnic or religious communities.