The ending of Kevin Smith's SModcast episode #259 called "The Walrus and the Carpenter", where Kevin Smith is with his longtime friend and producer Scott Mosier discussing and joking around with the story's third act, is heard in the second half of the end credits.
A scene after the credits shows Guy Lapointe holding his stomach and going "Ya just had to have the second slider. Ya just had to have the second slider."
And the Director would like to thank everyone who said #WalrusYes - either online or in real life.