Video supplied to me by Jim Carey is good representation of how we sing the song. We sing in unison up to 'walkin' with my baby down by the San Francisco Bay'. Then we go back to the beginning and repeat back to that point on our kazoos. We go back to singing 'Sittin' down and lookin' through my back porch'. At the end of the song we sing 'walkin' with my baby down by the San Francisco Bay' twice. Then repeat the ending on kazoo. Bob plays guitar.