"Boy, What a Night" is a swinging blues original by Lee Morgan from his 1963 Blue Note album The Sidewinder. Written as a 12-bar blues in B-flat at approximately 220 bpm, the tune strips away the Latin and funk influences heard elsewhere on the album to present Morgan's group in a pure hard bop blues setting. Joe Henderson leads with two choruses of tenor saxophone, his robust tone and rhythmic sophistication driving the performance forward. Morgan follows with two trumpet choruses of dazzling invention, his lines combining melodic beauty with harmonic daring. Pianist Barry Harris closes the solo section with two choruses of elegant bebop piano that reflect his deep roots in the Detroit hard bop tradition. The medium-up tempo creates an ideal swing feel, and the straightforward blues form allows each soloist to focus on melodic and rhythmic creativity rather than navigating complex harmonic structures. The tune's ebullient title and the joyful energy of the performance suggest the excitement of a great night of music-making, capturing the spirit of the Blue Note recording sessions where some of the finest jazz of the era was created. This track demonstrates that Morgan was as compelling in a straight-ahead context as he was in more commercially oriented settings.