Trippy Cartoon Network Short

I found this recent Reddit post on r/tipofmytongue where someone was also trying to find a Cartoon Network short involving a hatch opening on a man’s back:

https://www.reddit.com/r/tipofmytongue/comments/1cns4tz/tomt_forgotten_animated_short_from_cartoon_network/

Hm. Not sure what context this aired in. The reddit post implies it would have been about a minute long, which suggests a bumper. And while it's true that CN often aired relatively long bumpers and shorts to fill time (see Groovies), these wouldn't typically be acquired programming and the like. At the time, Nicktoons Network was known for not having traditional commercials, and as such they would fill time with various nickelodeon interstitials (see Astrology with Squidward) as well as acquired international shorts and the like. Cartoon Network did air stuff like this, but only in one place, a show called O Canada. They wouldn't acquire an artsy short and air it at random as a bumper like Nickelodeon would. Unless it was created by CN themselves. I definitely think there's a there there but as someone with a lot of knowledge on pre-CN City Cartoon Network, I'm just not coming up with where this would have aired. If it was on something like Sunday Pants, that would make more sense, but here and the reddit post both give pre-CN City time-frames.

That wasn't my point at all... but, the mention of Europe got me thinking, international versions of Cartoon Network WERE liable to air random acquired shorts and air them to fill time. Cartoon Network Latin America would often have much of the night schedule dominated by commercial breaks made up of old El Santo shorts, Canadian shorts, Pixcodelics etc. as the channel didn't have that many advertisers.

I guess to expand upon my first answer, this cartoon (and the one from the Reddit post I guess) doesn’t ring any bells. I watched Cartoon Network pretty religiously in the early 2000’s so I doubt that this was just some typical bumper or something like that. Now I never watched Sunday Pants or O Canada. I also rarely watched Adult Swim. Im thinking if this was indeed on CN, it must have been part of some program.