She's one of those girls who seems to come in the spring
One look in her eyes and you forget ev'rything you had ready to say
Where the introduction completes this with "And I saw her today, yeah" and then continues with the rest of the song, the coda fades out part-way through the "One look in her eyes..." line. Fading out during that line gives an impression of what the line itself describes: "forget[ting] ev'rything you had ready to say." It's as if the song itself gets distracted by "one of those girls," forgets what it's doing, and just trails off.