"John S." is a Sonny Rollins original dedicated to his friend and fellow saxophone titan John Coltrane, recorded for the 1962 album The Bridge. Built on an unusual 34-bar form, the composition moves at a blistering tempo approaching 280 beats per minute, creating a thrilling showcase for extended improvisation. Rollins tears through nearly seven choruses with the kind of relentless inventiveness that earned him his reputation as jazz's greatest spontaneous melodist, his lines cascading over the changes with breathtaking rhythmic variety. Jim Hall follows with nearly three choruses of electric guitar improvisation that matches Rollins's intensity while maintaining his own distinctive lyrical voice. The interplay between the two soloists is one of the highlights of The Bridge, demonstrating how different instrumental personalities can complement each other in a quartet without piano. The tune's unusual structure and rapid tempo make it one of the most demanding performances on the album, and both Rollins and Hall rise to the challenge magnificently. Bob Cranshaw and Ben Riley provide a propulsive rhythmic foundation that never falters, and the quartet's collective energy builds steadily throughout this extended performance.