"Sleep Walk" is an instrumental steel guitar-based song recorded and released in 1959 by Santo & Johnny. The song was composed by brothers Santo and Johnny Farina. (The original single credits three Farinas, including an "A. Farina" for the composition. It's sometimes reported that their mother or sister helped, but this is apparently false.1) It was recorded at at Trinity Music in Manhattan. "Sleep Walk" entered Billboard's 'Top 40' on August 17th, 1959. It rose to the No. 1 position for two weeks in September (the 21st and the 28th)2 and remained in the 'Top 40' list until November 9th. It was the last instrumental to hit #1 in the 1950s and earned Santo & Johnny a gold record.3
In Europe, French award-wining guitarist Jean-Pierre Danel hits the Top 20 with his instrumental version of the song recorded in 2006. The song appears prominently at the end of the film La Bamba during Ritchie Valens' funeral and the subsequent scene of his brother, Bob, screaming Ritchie's name to the heavens.
In the movie Twelve Monkeys, the song plays over the car radio during a scene in which psychiatrist Dr. Kathryn Railly has been abducted by time traveler and mentally divergent James Cole.
The song was also used in the Stephen King movie, Sleepwalkers.