Runaway
by Del Shannon
The song features a famous solo by Max Crook, performed on a heavily-modified clavioline that Crook called the “Musitron”. The clavioline is an electronic keyboard instrument, a forerunner to the analog synthesizer. (wikipedia)
Man, I think that Musitron solo could be the greatest moment in music in the past 500 years, and I will think that for another week or so until I find another organ/piano solo to obsess over.