Collision is a documentary film released on October 27, 2009 featuring a debate between prominent atheist Christopher Hitchens and Douglas Wilson, Presbyterian pastor of Christ Church Moscow. Described by Hitchens as a "buddy-and-road" movie, it provides an overview of several days worth of debates following the release of their book Is Christianity Good for the World? The book was generated by correspondence published in Christianity Today.

The partnership between Hitchens and Wilson began in 2007, when Hitchens invited anyone to debate his viewpoints following the release of his book God is not Great. Wilson's agent heard the offer and put him in touch with Hitchens, leading to a series of written debates published in Christianity Today, which eventually were compiled into Is Christianity Good for the World? Filmmaker Darren Doane heard about the exchanges between the two and sought them out to make a film. The film was featured on CNN, Fox News; NPR ; The Laura Ingraham Show and others.

A collision is an isolated event in which two or more moving bodies (colliding bodies) exert forces on each other for a relatively short time.

Although the most common colloquial use of the word "collision" refers to accidents in which two or more objects collide, the scientific use of the word "collision" implies nothing about the magnitude of the forces.

Some examples of physical interactions that scientists would consider collisions:

Some colloquial uses of the word collision are:

Collisions involve forces (there is a change in velocity). The magnitude of the velocity difference at impact is called the closing speed. All collisions conserve momentum. What distinguishes different types of collisions is whether they also conserve kinetic energy.

Specifically, collisions can either be elastic, meaning they conserve both momentum and kinetic energy, or inelastic, meaning they conserve momentum but not kinetic energy. An inelastic collision is sometimes also called a plastic collision.

A “perfectly-inelastic” collision (also called a "perfectly-plastic" collision) is a limiting case of inelastic collision in which the two bodies stick together after impact.

A film, also called a movie or motion picture, is a series of still or moving images. It is produced by recording photographic images with cameras, or by creating images using animation techniques or visual effects. The process of filmmaking has developed into an art form and industry.

Films are cultural artifacts created by specific cultures, which reflect those cultures, and, in turn, affect them. Film is considered to be an important art form, a source of popular entertainment and a powerful method for educating – or indoctrinating – citizens. The visual elements of cinema give motion pictures a universal power of communication. Some films have become popular worldwide attractions by using dubbing or subtitles that translate the dialogue into the language of the viewer.

Films are made up of a series of individual images called frames. When these images are shown rapidly in succession, a viewer has the illusion that motion is occurring. The viewer cannot see the flickering between frames due to an effect known as persistence of vision, whereby the eye retains a visual image for a fraction of a second after the source has been removed. Viewers perceive motion due to a psychological effect called beta movement.

David Paul Cronenberg, OC, FRSC (born March 15, 1943) is a Canadian filmmaker, screenwriter and actor. He is one of the principal originators of what is commonly known as the body horror or venereal horror genre. This style of filmmaking explores people's fears of bodily transformation and infection. In his films, the psychological is typically intertwined with the physical. In the first half of his career, he explored these themes mostly through horror and science fiction, although his work has since expanded beyond these genres. He has been called "the most audacious and challenging narrative director in the English-speaking world."

Born in Toronto, Canada, Cronenberg was the son of Esther (born Sumberg), a musician, and Milton Cronenberg, a writer and editor. His family has been described as "a nurturing middle class family." He began writing as a child and wrote constantly. He attended high school at Harbord Collegiate Institute. A keen interest in science, especially botany and lepidopterology, led him to enter the Honours Science program the University of Toronto in 1963, but he switched to Honors English Language and Literature later in his first year. Cronenberg's fascination with the film Winter Kept Us Warm (1966) by classmate David Secter sparked his interest in film. He began frequenting film camera rental houses, learning art of filmmaking and made two 16mm films (Transfer and From the Drain). Inspired by the New York underground film scene, he founded the Toronto Film Co-op with Iain Ewing and Ivan Reitman. After taking a year off to travel in Europe, he returned to Canada in 1967, graduating from University College at the top of his class.

Senna is a British 2010 documentary film that depicts the life and death of Brazilian motor-racing champion, Ayrton Senna. It is Asif Kapadia's fourth feature film as director, and is produced by ESPN/Working Title and distributed by Universal Pictures/Walt Disney Pictures, and Producers Distribution Agency in the US. It has received great critical acclaim.

In the film, both through home videos provided by the Senna family and from interviews with people that had known him, Senna is presented as sublime, spiritual, on occasion ruthless, as well as private, humble and fiercely patriotic, donating millions to his native Brazil and contemplating a life outside motor racing.

The film begins with Senna's arrival into Formula One during the 1984 season, briefly covering his time at Toleman and Lotus before concentrating on his career at McLaren. The documentary concentrates on his time with the British team – namely his rise to global fame – becoming a World Champion, his rivalry with his team mate Alain Prost, and his political struggles with the then head of FISA Jean-Marie Balestre. The film covers the climax of the rivalry during the 1989 and 1990 seasons, when Senna and Prost were involved in controversial clashes which decided the drivers' title.