"The Trolley Song" captures the exhilarating feeling of a new romance blossoming, set against the backdrop of a trolley ride. The lyrics paint a picture of a chance encounter that quickly turns into affection, with the rhythm of the trolley mirroring the beating heart of the singer. This song was specifically written for a trolley scene in the 1944 film Meet Me in St. Louis, after earlier attempts were deemed too generic. The songwriters found inspiration for the song's unique charm by researching turn-of-the-century trolleys, aiming to perfectly match the film's setting and the character's experience. It plays like a joyful, spontaneous expression of love at first sight.