An instant is a infinitesimal moment in time, a moment whose passage is instantaneous.

The continuous nature of time and its infinite divisibility was addressed by Aristotle in his Physics where he wrote on Zeno's paradoxes. The philosopher and mathematician Bertrand Russell was still seeking to define the exact nature of an instant thousands of years later.

In physics, a theoretical lower-bound unit of time called the Planck time has been proposed, that being the time required for light to travel a distance of 1 Planck length. The Planck time is theorized to be the smallest time measurement that will ever be possible, roughly 10⁻⁴³ seconds. Within the framework of the laws of physics as we understand them today, for times less than one Planck time apart, we can neither measure nor detect any change. As of May 2010, the smallest time interval that was directly measured was on the order of 12 attoseconds (12 × 10⁻¹⁸ seconds), about 10²⁴ times larger than the Planck time. It is therefore physically impossible, with current technology, to determine if any action exists that causes a reaction in "an instant", rather than a reaction occurring after an interval of time too short to observe or measure.

Julian Fernando Casablancas (born August 23, 1978) is an American musician, singer-songwriter and frontman of The Strokes. Casablancas pursued a solo career during The Strokes' hiatus, releasing the album Phrazes for the Young on November 3, 2009.

Julian Casablancas was born in New York City, to Spanish American business mogul John Casablancas, the founder of Elite Model Management, and Jeanette Christiansen, a former model and onetime Miss Denmark. His paternal grandfather, Fernando Casablancas, was a well-known textile businessman. His parents divorced and his mother subsequently married painter Sam Adoquei. Adoquei helped shape Casablancas' early musical taste by exposing him to music such as The Doors, which was markedly different from the mostly Phil Collins-influenced music he listened to as a child. In 2005, Julian married the assistant to the Strokes' manager, Juliet Joslin. In 2010, they welcomed a son, Cal Casablancas.

The first member of The Strokes Casablancas met was Nikolai Fraiture, who attended Lycée Français de New York with him (Fraiture graduated in 1997, Casablancas in 1996). When he was 14, Casablancas' father sent him to Institut Le Rosey, an elite boarding school in Switzerland. There, he met future Strokes member Albert Hammond, Jr. Casablancas attended The Dwight School with two other future Strokes, Nick Valensi and Fabrizio Moretti. Casablancas never finished school, but continued to take music classes, where he says he first enjoyed himself in class.

John Winston Ono Lennon, MBE (9 October 1940 – 8 December 1980) was an English musician and singer-songwriter who rose to worldwide fame as one of the founder members of The Beatles, one of the most commercially successful and critically acclaimed acts in the history of popular music. Together with Paul McCartney, he formed one of the most celebrated songwriting partnerships of the 20th century.

Born and raised in Liverpool, Lennon became involved as a teenager in the skiffle craze; his first band, The Quarrymen, evolved into The Beatles in 1960. As the group disintegrated towards the end of the decade, Lennon embarked on a solo career that produced the critically acclaimed albums John Lennon/Plastic Ono Band and Imagine, and iconic songs such as "Give Peace a Chance" and "Imagine". After his marriage to Yoko Ono in 1969, he changed his name to John Ono Lennon. Lennon disengaged himself from the music business in 1975 to devote time to raising his infant son Sean, but re-emerged with Ono in 1980 with the new album Double Fantasy. He was murdered three weeks after its release.

Daniel Earl "Dan" Hartman (December 8, 1950—March 22, 1994) was an American singer, songwriter and record producer, best known for such songs as: "Free Ride", "I Can Dream About You", "Instant Replay", "Love Sensation", and "Relight My Fire", all of which had world-wide success.

Born in Pennsylvania's capital, Harrisburg, Dan Hartman was an American composer and singer. Hartman joined his first band at the age of thirteen, The Legends. His brother Dave was also a member of the band. He played keyboards and wrote much of the band's music, but despite the release of a number of recordings, none turned out to be hits. He subsequently spent a period of time backing the Johnny Winter Band and then joined the Edgar Winter Group where he played bass on three of their albums and wrote the band's second biggest pop hit "Free Ride" in 1972. Upon launching a solo career in 1976, he released a promotional album which had, as its full title, Who Is Dan Hartman and Why Is Everyone Saying Wonderful Things About Him?. It was a compilation disc including songs from Johnny Winter and the Edgar Winter Group. His second release, Images, was his first true album and featured ex-Edgar Winter Group members Edgar Winter, Ronnie Montrose and Rick Derringer and guests Clarence Clemons and Randy Brecker.