That can be just 10 seconds in a song... You know, just moments...
Personally, one of the finest moments is in the BLT 12". You have this robotic voice singing the chorus at the end and then Barney joins, like he was doing backing vocals with the robot and I think it's absolutely marvellous.
Same kind of thing with the "Good times are round the corner" at the end of "Run Wild". One of the best heart-warming moments I've ever heard...