I believe the creator determines it and the audience interprets it. Possibly in multiple ways, including some that the artist may have never thought of or intended.
Discover
Haha no problem! I'm a big fan of Sunny, I have the majority of it on my phone to watch offline on my work breaks or falling asleep, etc. I knew they showed a clip of that cartoon in the episode so I just went to it, took a screenshot, and reverse image searched it π
The cartoon they're watching is called Jerky Turkey from 1945. Link: https://tvtropes.org/pmwiki/pmwiki.php/WesternAnimation/JerkyTurkey
Hmmm, Mars University? Fry brings the monkeys and The Professor says "Hwhat's that they're flinging at us?"
Haha true, that roof has been destroyed so many times π
Ding ding that is correct! Amazing episode, on my last rewatch I caught this one second joke towards the end of the episode that I thought was great.
IIRC Nibbler's shadow was in the storyboard for the pilot. Shown on the DVD extras
You can't disappoint a picture π