The Longest Simpsons Couch Gag is Actually Pretty Dark
Geege Schuman stashed this in The Simpsons
Stashed in: Simpsons!
This gag was done by famous animator Bill Plympton. He did 3 couch gags total, episodes "Beware My Cheating Bart" in 2012, "Black Eyed, Please" in 2013 and "Married to the Blob" in 2014.
He also did animated this weird short:
Another cool Simpsons intro was done by Guillermo del Toro and has a ton of his movie references:
Thanks, they're both great!!