You could look a little deeper into the overdubs and recording of tracks. Pauls trumpet playing in Only A Northern Song is hilarious and no way is it meant to be serious, the silly calls by John and possibly George in Ob-La-Di Ob-La-Da, the daft ending to Lovely Rita (there are tons of silly noises thru-out Pepper).
Someone mentioned All Together Now as a possibilty. Totally agree with that after hearing the isolated 5.1 mixes, all kinds of insanity is in the making of that track. And a shout-out to Octopus's Garden with the milk blowing and all.
There will be many many more