“Runaway” by Del Shannon is an “eerie, aching, chart-topping 1961 single” according to the AV Club. “Few songs in popular music are so enduring yet ethereal. ‘Runaway’ is a moody song for a brooding scenario, one that seems to instantly sublimate into a glum, haunting fog. Written by Shannon and his keyboardist, Max Crook, it outlines in tear-streaked detail a guy who’s lost his girl. Guys losing girls is a primary preoccupation of pop songwriters, then and now, but ‘Runaway’ nudges that theme to a preternatural level. ‘As I walk along I wonder / what went wrong,’ he begins the song, not bothering to mention where he’s walking or why.
The not-so-secret weapon of ‘Runaway,’ though, is its keyboard. Crook joined Shannon’s band in 1959, and soon after he began toying with a riff on his Musitron, a self-built version of the clavioline that served as a precursor to the analog synthesizer. Modifying the instrument with spare parts from television sets and household appliances, Crook used his invention to turn his riff into the spooky, unsettling hook of ‘Runaway.'” The single went to #1 in the US and was a true international smash hit as well, hitting Top 5 in Australia, Canada, Chile, Belgium, Ireland, the Netherlands, New Zealand, Norway, the UK, among others.
The intro, verses, and iconic keyboard feature sections are in Bb minor; the choruses (first heard at 0:31) shift to Bb major.