Shrek - I Feel Good (partially found animation test of computer-animated film; 1996)
Shrek is a 2001 computer-animated film directed by Andrew Adamson and Vicky Jenson, based on the book of the same name. However, production for the film dates back to around 1995, when Chris Farley was originally cast as Shrek. Around this time, Dreamworks made an animation test featuring an early version of Shrek. It is currently unknown how long the animation test was.
All that's known about the plot is that Shrek enters a gated city at night, singing "I Feel Good." He comes across a 'Mugger' tied to a rope, who was singing along with Shrek. Shrek proceeds to play with him and then stretches the Mugger on his rope, and sends him soaring into the night sky.
Very, very little information has come up on this topic, and all that remains of the actual animation test are still images. In April of 2017, YouTube user "unclesporkums" uploaded a storyboard version of the animation test. He later re-uploaded it in September of 2017 because he found more storyboards of the animatic. Since voices were absent from the original upload, he decided to voice over the missing lines by himself. The upload can be watched down below and is roughly 2 minutes and 23 seconds long. Considering the storyboards' existence, it’s likely that the actual animation is either somewhere in the Dreamworks Archives or the hands of a collector.