The lost verse to the Full "House theme song is finally revealed when Jenny sings "When you're lost out there and you're all alone, don't go looking for Danny Tanner's home." Since we never made it to Danny Tanner's home, nor did we even come close to finding it, the lost verse of the song makes sense. When you are lost, you shouldn't even bother looking for Danny Tanner's home because you will end up in  a rough neighborhood and go up and down scary hills and spend the afternoon wasting your time in the city of San Francisco.