Further this sentence you have inserted is unreferenced: "The laughter at the end was Harrison's idea, placed at the end of the song in order to lighten the mood and follow the theme of the album." 
 This sentence is also unreferenced and relates directly to the recording: "The recording released on the album was sped up enough to raise the key from C to C#; an instrumental version of the song at the original speed and in the original key appears on the Anthology 2 album."